Idk if I’m being crazy but my husbands friend got a wife, we all are friends and they come to my apt every weekend to spend time together, now the wife has been bringing her little sister and my husbands so friendly with her, making jokes and calling her baby she’s a 16 but looks

Much much older. My friend and I went out to get alcohol and she couldn’t go because she’s a minor she Stayed with my husband and her brother in law. Another day I was in my room and they were both in the kitchen with her brother in law, everything was quiet until they heard me come out of the room everyone started walking and talking, what do I do? Am I being paranoid?