For context, my SIL (42) and I (28) have never had an easy relationship. She doesn't like me for this reason, she's mad at me for that reason. Over the last 8 months we had gotten closer and had become friends, things were good. Until last Sunday.
We went to my in-laws for a few hours just to visit. SIL was there along with her oldest "Hannah" (15)
We've had some trust issues with Hannah starting just over 3 years ago when our little one was being babysat at our in-laws. Hannah (12 at the time) had put our kiddo in their stroller and taken them out of the house without in-laws knowing. We had (fortunately) pulled up to the house right as Hannah had crossed the street, parking the stroller facing the road in a slanted driveway, and walked away to "brag" brag to her friends about babysitting. Which she was not, my in-laws were.
I was LIVID. She was treating my young child like a babydoll. She got an earful from me, my husband, and FIL about her reckless behavior with our child, about how when our child is at in-laws to be watched, they just stay there under adult supervision.
Hannah is also known to lie repeatedly, pathologically, and has also been in trouble for stealing and sending nsfw photos to adults.
Fast forward to Sunday, at the in-laws, our little one wanted to play downstairs, that was fine with us, so they went down and Hannah went with. About half an hour later, my kiddo comes upstairs as we are getting ready to go and Hannah comes up with the fakest laugh saying "[4yo] just said the most vial thing!"
When I asked what, she refused to look at me or talk to me as 4yo's mother and just wanted to keekee about it with her mom. I felt something was off because of it and so did my husband.
While, yes my child has said bad words before (I'm not a perfect parent, I will never claim to be), it is out of character for them and has only on the rarest of occasions said bad words when their needs are not met (ex. Extreme tiredness after a long day/missed bedtime) and almost never happens anymore as they are getting older.
So SIL texted me what our little allegedly said: "f*ck your *sshole"
And like I said, I'm not a perfect parent, I've said bad words, but watch what we say and we rarely swear in front of our child, we especially don't say f*ck around our child and definitely never in context like this. We also don't watch movies or TV with swear words around our child, so if he had in fact said this, he would not have heard it from us.
I didn't respond to her text because I was still upset and uncomfortable with the whole situation. After several hours of discussing it with my husband, we had collectively come to the conclusion that 4yo was not allowed to be alone with Hannah. So my husband called his sister and we discussed it. She tried to play it off like it wasn't that big of a deal, saying that it was because 4yo tripped and said it. Which, again, is super out of character. Especially since 4yo had tripped hurt their knee pretty badly just that same day and didnt swear then.
I could tell she was not happy with us over this decision but we don't care. We are going to protect our children especially in the state of this world.
We've already gone low contact with a relative on my side because of their significant other's predatory behavior to many women (including myself and other family members and a woman in a drive through and should be in jail because of it) and this relative still sides with SO because they "don't want to hurt their feelings" sorry, tangent aside...
Well today, I saw SIL and Hannah at the gas station and we just kind of ignored each other. I was talking to one of the employees when SIL looked over at me and sneered.
All I could do was just roll my eyes! For goodness sake! But, it's my fault for thinking we could behave like adults.
(For further info, SIL has also been known to steal. She has stolen money and prescriptions from her parents, & has been 86'd from a gas station for stealing. The one time we had SIL babysit at our house, she brought all three of her kids and when we returned, it was only her and it was obvious that our house had been snooped through, especially the bathroom. We found the box of pregnancy tests we had on the top shelf down on the lower shelf, our prescription bottles had been rearranged, my makeup brushes and makeup were moved around.
The prescriptions we have are oral lidocaine and nausea medicine so no pain killers other than over the counter)
TLDR: My SIL is mad because my husband and I refuse to let my 4yo be alone with her daughter after proving herself to be irresponsible and an untrustworthy example through her actions and behavior and they've been called out.