I think you're right. I think the whole family gathering thing also has to do more with her family than with me. She has distanced herself from them and she continually complains that they like me more than her.
Also, from things the kids have told me it's like everything is a competition between her and I as far as she's concerned. If I do something with them she has to try and do something better. She spends money on them and does things with them but she doesn't really spend time with them and connect and interact. Her thinking right now is very superficial, much like a teenager's.