Hi, yes I've been through this and I think its a battle for the alpha male in the home. Especially, if you were a single mom. They feel like they are competing for your love and attention. They also don't want another male figure around. Even though they need a good male role model. You have to take it real slow and not try to make them like him. It doesn't matter who it is they don't want you to be with anyone. Not till they are older. So my advice is take it slow.