It sounds more like she is unhappy because she thought she was going to get money from the sale of your house and also be able to get alimony and even child support. Her unhappiness has nothing to do with caring about you and even her own children.

From what you shared your wife is just a user and that’s what her bff’s are too. She even stole from her own children. She isn’t the type that enjoys the kind of gatherings you enjoy.