Hi whenever I hang out with my boyfriend his sister wants to be around she gets really jealous if we go out and she’s not there or if I come over to hang out she wants to be there too . She’s very shadey and I try to tell my boyfriend but he just doesn’t seem to see it idk what to do . She also tells him stuff that is wrong and makes no sense and he follows whatever she says 😒 any advice on how to deal with her . (Ps she’s not in a relationship so she spends her time involved in ours )