[SilentScream244]

Me and my boyfriend have been together for 9 months, its a wonderful relationship but over the past few months, I've noticed my sister acting different whenever he comes over to my house. Like whenever I ask my mom if he can come over and she'll say yes, my sister would just pop in the conversation and ask "Brian's coming over? What time??" And I would just think "Why does she want to know???" And then when he comes over and we hang out in the living room together my sister would just walk by us a million times and sometimes I would catch her looking at him. She would even wear super short shorts and a shirt that shows her chest area whenever he comes over, she's done it 3 or 4 or 5 times already. But it's weird. Whenever HER boyfriend comes over, she wears regular gym shorts and a shirt and acts normal. Are these signs that she does like my boyfriend cause I think they are and if she does like him, I need to tell my mom so she can tell her cause she listens to her(kinda)