So I'm a bit stumped on a solution to this. Or even if there is one.
My DCs see their DF every other weekend.
I've started seeing this lovely guy.
He has DCs every weekend.
So far we've had daytime dates, which have been lovely, we are both keen on each other.
However we are now at the stage where we'd like to have an evening in with him, which ideally would last until the next day. 
The problem is how do we get around this dilemma, I don't want to put pressure for him to give up contact time, kids need time with their dad's.
One good thing is we are both self-employed and work from home and live 10 mins drive from each other, so day time dates are easy to arrange.
Anyone else in this situation? And how do you work it?