I am trying to get unbiased opinions to help me make a decision. I have 2 children 2 and 4. Their father and I have been divorced for 8 months. I have the children then majority of the time. He gets them every other weekend and a dinner visit on Tuesdays. Since we have gone to court he has showed up for 1/3 of his Tuesday visits and on a few occasions he doesn't come on weekends. He is allowed to talk to the kids every day yet he never calls. The only contact they have is on his specified days (most of the time). Our children have never been away from me for more than 3 days at a time. The kids are very attached to me and have a hard time adjusting after one weekend with him. He now says he wants them for a 10 day vacation to go see his GF's family (people none of them have ever met). I am concerned for many reasons, mostly listed above. Am I being un-reasonable not to let him have the kids for the vacation?