How can I calm my cousin down ?

[Erraticbanana405]

My cousin and her husband have been married for 6 months and she's gonna have a baby next month. He has a son from a previous marriage and his son is kind of a brat and always getting into trouble but he's only 10. My cousin is so upset and she's scared because she saw on her husbands facebook page he's kissing his two ex girlfriends and she's so freaked out and scared he might leave her but he loves her so much I know he's not gonna leave her but she thinks he will. She's afraid to talk to him about it and its making her even more upset and afraid. I've tried everything to calm her I hugged her and I talked to her and gave her some medicine and some water to cool her down but nothing worked she's still really upset. She's in her room resting now and her husband isn't home yet he's still working. He'll be home in about an hour. What can I do to calm her down ?