Rough: Man its interesting that your having this little drama about time with your son right now. Don't beat yourself up about making a snide comment, its gonna slip out now and then. I always worry myself to death that one snide comment will push things over the edge, and you have to be cautious about making them. But even with that being said your having many more positive interactions than negative ones, and we're all human and are going to make a mistake now and then. Live with hit and move forward...just make sure you have more positive ones in the future.
Its very hard, I think especially in my case when it involves my son and I see him hurting. My wife has been pretty callous towards "our" son and has put all of her effort into making sure "her" son is happy. I absolutely despise those labels b/c i've been raising my SS16 since he was 18 months old, but he's gotten to the age that he rejects me and wants to be with his "real" dad. I knew it was coming, and tried for years to prepare my wife for it, its natural for a young man his age and i'll wait patiently until he's 18-20 or so and then walks up and hugs me and says thanks.
Anyway, sorry for the hijack....the part I was going to mention is about the changing....just learn to roll with whatever she thinks is best for now, I know im having to do that as well b/c it seems like whatever works best for her right now is the schedule we're keeping. I dont think thats being a doormat, b/c I would demand time with him if it came to that, but in the same breath if she wants me to keep him more so she can go out, so be it i'll spend all the time I can with him right now b/c I know this is throwing him in all different directions and want him to be as stable as is possible through all of this.