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Mom Changes Locks After Finding Her Former Mother-in-Law in the Living Room Uninvited

by Carolyn Mullet
December 24, 2025
in Social Issues

Navigating life after a separation is often like learning to dance to a new song. You might step on each other’s toes a few times before finding a rhythm that works. Finding that balance requires clear communication and a lot of respect for personal space.

One mom recently shared a story about her struggle to maintain boundaries with her ex-husband’s family. She tried to be flexible by offering a spare key for the sake of the children. However, she was surprised to find that her generosity led to unannounced visits from her former mother-in-law. When talking didn’t solve the problem, she took a physical step to secure her privacy.

It is a relatable tale for anyone who has ever had to draw a line in the sand.

The Story:

Mom Changes Locks After Finding Her Former Mother-in-Law in the Living Room Uninvited
Not the actual photo

AITA for changing the locks when my ex husband gave his mother his key to my place?

My ex husband and I have 2 sons (ages 3 and 6)

and a daughter (10 months). We split up just over a year ago, and during proceedings he got 1 weekend a month with our sons, and no custody

of our daughter. He has to drive to the house to get the boys on his weekends. Because sometimes I'm on work calls or dealing with the baby,

and the boys always forget things at my place, we agreed that he could keep his key to the house so he could run in and grab stuff

or come get the boys without disturbing me/the baby. 2 months ago, I found my ex's mother in my living room, playing with my daughter.

I asked her how she got in, and she said that ex had given her his key so she could pick up the boys for him. I told

her that as ex is meant to be the only person collecting the boys, I'd rather ex came for them in future. She said she understood and would

relay my message, then took the boys to ex, and all was fine. A month later, she just let herself into my home to pick up the

boys again. I was a lot sterner this time, saying this was my home and she couldn't just let herself in. She responded that this wasn't just

my home, but also the home of her grandchildren and it used to be her son's home, too, and she has a key, so she shouldn't need to

request my permission to enter. When she left I called my boyfriend, who then said he'd pick up a front door lock and come over and fit

it, if I wanted. I agreed, and within an hour the lock was changed and a latch was added. On Sunday, someone started knocking rapidly and forcefully

on the front door. I saw it was my ex's mother and she had my sons with her, so I let the boys in, and she began to

tell me that her key wasn't working so she'd need a new one. I said her key wasn't working because I changed the locks, and she wouldn't

be getting a new one. She told me that I had to give my ex a new key so I might as well give it to her to

give to him, and I refused, saying that clearly my ex can't be trusted with my key so he won't be getting one either. Since this conversation,

I have had non stop calls/messages from both my ex and his mother, saying I need to give one of them a key because them not having access

to the house means having to rely on me to give them access, and that I am making things extraordinarily difficult for the both of them.

They say that they need to have a key for the reasons in the first paragraph, and I've said that they need to start letting me know

when they'll be coming so I can let them in. They say that I am restricting access to the children as they'll now have to work to

my schedule, but I checked and I'm well within my legal rights. Morally, however, I am unsure because technically speaking I am restricting access to the kids,

and making life harder for all of us over 2 incidents.. AITA?

My goodness, this is such a tricky situation. Walking into your own living room to find an unexpected guest can be truly startling. It feels especially vulnerable when that guest is someone you are no longer related to by marriage.

You really tried to be accommodating by sharing that key. It was a lovely gesture to make drop-offs easier for the kids. However, your home is your sanctuary now. The grandmother’s belief that she had a right to be there because of the past shows a real disconnect. Taking steps to feel safe in your own space is completely understandable.

Expert Opinion

This story highlights a concept psychologists call “boundary turbulence.” This happens when the rules of a relationship change, like after a divorce, but one party continues to act as if the old rules still apply. The grandmother holding onto the idea that the house is still “family property” is a perfect example of this.

According to research from the Journal of Marriage and Family, clear physical and emotional boundaries are essential for a healthy post-divorce co-parenting relationship. When lines become blurred, it creates stress for everyone, including the children. The mother-in-law likely views her actions as helpful grand-parenting, while the OP experiences them as intrusive.

Dr. Henry Cloud, a clinical psychologist and expert on boundaries, often writes about the necessity of ownership. He suggests that we are responsible for what is inside our own fences. By giving the key to his mother, the ex-husband abdicated his responsibility. He essentially opened a gate that he promised to keep private.

It is also important to note the legal side of things here. The National Association of Realtors notes that once ownership transfers or a lease is in one name, previous occupants have no right to entry. The grandmother’s argument that “it used to be his house” holds emotional weight for her but holds no water in reality.

The OP was right to prioritize her feeling of safety. When a boundary is crossed repeatedly, words are often not enough. Actions, like changing a lock, send a message that the new rules are non-negotiable.

Community Opinions

The online community was very vocal about the importance of privacy. They largely felt that the OP did the right thing by protecting her home environment.

Establishing Proper Boundaries: Users emphasized that the ex and his mother lost their privileges by abusing them.

StAlvis − NTA them not having access to the house means having to rely on me to give them access AND THAT'S THE WAY IT SHOULD BE

ICWhatsNUrP − NTA. Not a chance in hell. He is your ex. That means he doesn't need unfettered access to your things.

Especially if he is going to give the key to his mother who thinks her wants trump all your concerns... s

aying I need to give one of them a key because them not having access to the house means having to rely on me to give them access Why yes,...

The Reality of Ownership: Commenters pointed out that past residence does not equal current access.

SammyLoops1 − omg NTA at all. "and it used to be her son's home, too" USED to, not anymore.

I'm starting to get an idea why you divorced this guy... They've abused the privilege and do not respect you whatsoever.

FabFatFun − NTA lmao, it isn't a shared hotel room, it's your home. She has no right to be there without your express permission and frankly,

neither does your ex. He vacated the home, meaning it's now yours and he has no further right to it.

White_RavenZ − NTA - Having 1 weekend a month with his boys does not mean he’s allowed 24/7 access to your home.

You are not restricting access to the kids, but to your home. Your ex doesn’t live there anymore. He doesn’t get to just waltz in whenever he feels like it.

Legal and Safety Concerns: Several people noted the legal implications of entering a home without permission.

cantankerouswhale − NTA at all. They have 0 boundaries.

Matthewrmt − Obviously, neither she no the ex can be responsible with access to your home. .

You established very clear boundaries that they are ignoring. They have made their life more difficult and restricted access, not you. NTA!

hamhockmom − I'm curious, why doesn't he have any custody of the youngest? NTA.

Handling the Consequences: Readers felt the inconvenience was a natural result of their actions.

cantankerouswhale − NTA at all. They have 0 boundaries.

Matthewrmt − Obviously, neither she no the ex can be responsible with access to your home. .

You established very clear boundaries that they are ignoring. They have made their life more difficult and restricted access, not you. NTA!

hamhockmom − I'm curious, why doesn't he have any custody of the youngest? NTA.

How to Navigate a Situation Like This

If you are dealing with boundary issues after a breakup, the most important thing is consistency. It is very kind to want to make things easier for your ex, but kindness should never come at the cost of your security.

Start by having a clear conversation, preferably in writing. You might say, “I am happy to facilitate pick-ups, but I need you to text me upon arrival rather than letting yourself in.” This creates a paper trail and sets a respectful tone.

If those requests are ignored, taking physical action like changing locks or codes is completely appropriate. You can remain calm while doing this. You are not “punishing” them. You are simply securing your home. Remember that “no” is a complete sentence. You do not need to justify your need for privacy to anyone.

Conclusion

This story serves as a reminder that trust is a fragile thing. The mom in this situation offered an inch, and her extended family tried to take a mile. By standing firm, she taught everyone that her home is hers alone.

How do you handle spare keys and privacy with your family? Do you think the OP should have given them one more chance, or was the lock change necessary? We would love to hear your gentle advice on this topic.

WHAT DO YOU THINK OF THIS STORY?

WHAT DO YOU THINK OF THIS STORY?

OP Is Not The AH (NTA) 9/9 votes | 100%
OP Is Definitely The AH (YTA) 0/9 votes | 0%
No One Is The AH Here (NAH) 0/9 votes | 0%
Everybody Sucks Here (ESH) 0/9 votes | 0%
Need More INFO (INFO) 0/9 votes | 0%

Carolyn Mullet

Carolyn Mullet

Carolyn Mullet is in charge of planning and content process management, business development, social media, strategic partnership relations, brand building, and PR for DailyHighlight. Before joining Dailyhighlight, she served as the Vice President of Editorial Development at Aubtu Today, and as a senior editor at various magazines and media agencies.

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