Y.S.
I'm new to this, so I have to ask a question..Is this guy her biological father? If he is a new stepfather I could almost understand his reluctance to accept another family member in the house, disrupting his time with his new wife/significant other. It's possible he's just jealous of the time (and money) being spent on her. If he is the biological father, shame on him. Unless you are leaving out a major behavioral problem that perhaps you as a loving mother a blind to, she sounds like a normal, friendly, happy child who contributes to the household on a regular basis. A 17yr old daughter that calls her mother into her room to share something funny that she and her girlfriend have seen is a delight indeed. I personally LOVE it when my teenage daughters run into the room to show me something funny or interesting when they have a friend over. I feel included and appreciated. If he cannot appreciate this girl,perhaps something is missing in his own relationship with her. He's only got a few years left to re-establish a friendship with this great kid, so he'd better get cracking! Maybe they have more in common than he thinks. Good luck!