Rather a long post, so please bare with me.
DH and I were both previously married, I have a DD who's now eleven and he has two boys, 13 and 15. DH moved from Scotland to London after the divorce, however he and BM worked very hard to make sure he still had contact, boys came to visit him every vacation and he'd travel back and forth, a year after moving to London, we started a relationship and then eventually got married. Thankfully our kids have always gotten along, it's been five years now and not an issue, partly I believe because of the short amount of time DD and the boys have spent together, during the holidays / alternate weekends she visits her father, so when the boys are around, she rarely is. This summer BM, the boys and BM's new DH all moved down to London for various reasons. Everyone was rather happy, especially me as DD would be starting year seven and with the boys enrolling in the same secondary school, she would have two older boys looking out for her. Over the summer DD was practically glued to DSS 1, the 15 year old. Showing him around town, introducing him to her friends, sitting next to him all the time, he wasn't too bothered, so I left it alone, assuming she was just excited and would eventually calm down, she hasn't. In fact, she's gotten worse. She's never made an issue about going to see her father and now all of a sudden, his house is boring and she'd prefer to stay with us. When DSS 1 goes to his BM's house, she sulks and asks to go over, which starts an argument and ends with her going to her room. Talked to DH about it and he thinks it's just cute, which doesn't help at all. Then talked to DSS 1 who says "she's a little annoying but I can live with it" as nice as that is, I don't want him to have to live with it. Tried to talk to DD about it but she just got horribly embarrassed and didn't want to talk about it at all, no one else seems to think it's an issue, so will she grow out of it or should I keep trying to stop it before it escalates?