Help!

So idk what’s going on with my step baby but every time me and dad are talking or in bed watching tv and she’s playing alone and realizes we are laying together or he’s sitting by me or laying on me on the couch she will come over and want to be on the bed with us or get upset or throw a fit if he is next to me and she isn’t. Idk if she feel left out or what but has anyone ever dealt with this ?