(First of all, I'm French and I use a translator, so I hope that doesn't interfere with reading)

I'm a bit distant with my family, I'm in my corner and so are they. I love my little sister very much, but apart from watching films or chatting a bit, we don't do anything in particular. She's closer to my other brother.

Since I've been away from home, when I come back for vacations or weekends, I get the impression that something has changed. My little sister is rather thin and small, and probably has a complex about that, so she often wears oversized clothes. Like a sweater and panties, for example, or heavy jogging pants...

But when I come to visit, she wears clothes that are more revealing than before, closer to the body and less subtle than a big sweater. Nobody around me reacts as if everything's normal, but I know very well that she only dresses like this when I'm there!

I have the impression that she puts herself in certain positions on purpose too. The other day I saw her in a sweater and thong lying on the sofa playing on her tablet, perfectly oriented so that's all I could see when I entered the living room... I've done a lot of laundry at my mom's and I know she's never had a thong before...

To top it all off, the other day she dropped her phone in front of me. As she picked it up, her sweatshirt showed me her buttocks, concealed by the smallest thong I've ever seen in my life, and it's one of my fantasies, so I've seen some...

The image of her little holes remains engraved in my memory, but her anus... That was something else... Adding taboo to taboo! But as I said, nobody around me is reacting to this and I don't know if I'm going crazy, if I'm imagining things and it's got nothing to do with me or if there's something going on...

If any moms, dads, sisters, or people in the same situation would have any advice that would be fabulous as I'm quite lost honestly...