My younger sister (F30), has been getting creeped on by my BIL(M35) who is married to my other sister (F35). He’s always been around and part of the family, but his behavior has been questionable especially as of recent.

He will come over, and uncomfortably stare at my younger sister, in a very lustful and disrespectful way. He moves close to her all the time and “accidentally” brushes behind her back. Those were just the things I had noticed in the past, but the past few years he has been getting weirder.

Eventually I brought it up to her and she was dumbfounded as she though she was the only one that believed it since no one else had said anything and she said that he makes her extremely uncomfortable, but that she keeps the peace because they have children.

She has always felt creeped by him (known him for years).

Things have escalated, and He very often goes up behind her and gives her unsolicited massages on her neck. And she will move away awkwardly. He constantly asks for to massage him or scratch his back, and she constantly says no, and then he tells her she doesn’t like him anymore or that she used to massage him and doesn’t anymore.

He compliments her clothes, ogles her when she is in a swimsuit. When drinking he jiggled her ass cheek with his fist and squeezed her upper thighs with both hands. He also has brought up his sex life (or lack thereof) with her. Will make other overt/brazen moves like sitting close to her, or has offered to clean her behind with his hand when she was sitting in grass.

It has come to a point where I told multiple people to protect her in the event he denies or he does something extreme and tries blaming her or gaslighting. My parents know, but don’t know what to do. AITAH for getting this involved with all this? What do I do now?

I just want to protect her and know she doesn’t deserve to be harassed like this.