Hi,
I'm 25 and have been with someone for a year and a half. My sister is 19... started with her constantly saying how nice he was (fine - parents also said similar) but then it was "gosh, he smells so nice" - we laughed about it, didn't think much of it. Then complimenting his looks, constantly. Always telling me how lucky I was to find someone so nice and attractive. Never anything directed at him to start with, but after a few months subtly began to say to him these compliments. He used to just say to me "oh, your sister is sweet".
She then did stay round our flat after partner suggested it because she did us a favour and dropped us home after a night out. She wore the skimpiest pyjamas she owns  I don't know, I felt really uncomfortable.
I don't know, the list goes on. I really want to talk to her, but I know it won't achieve anything and she will deny it and say I'm the one being paranoid (am I???)
My boyfriend says he hasn't really noticed, just thought she was trying to be friendly.
Hmm... I feel bad for thinking it tbh, but am I right to think so?