<blockquote><b>Quoting ~Jekka~:</b>" We have another child here. So she isn't an only child here either. lol, I'm not trying to argue or ... [snip!] ... the disappointment of her thinking she gets to spend a night with them all, only to have to be palmed off to someone else."</blockquote>
I don't think that's the answer. You say he's a great father. Don't take that from her. There's a reason the courts don't let children choose who they want to live with until they're 13. My son has said plenty of times he didn't want to go to his dads, I'm sure he's said he doesn't want to come home too. But children are children and they don't know what's best for them. His dad is more stern but does more wild and crazy things. I'm more lenient but were more laid back and don't do as much extravagant things. So sometimes he prefers one over the other but he needs both of us for different reasons. And regardless of how him or I feel, he needs his father in his life.
I dont think your being unreasonable.
I'd personally talk to him and see if hes willing to change it.
You dont want her growing up to resent him for what hes doing but you also dont want her growing up resenting you for 'keeping him away'. (NOT that i think your doing that but thats how she MAY see it someday)