My D (also 2) just tried to push my head down on BF's leg (so we'd snuggle - which hasn't happened in gosh knows how long) she was INSISTING while we were reading her books. And he called it out. I moved away. But still....
I think these kids (at such a young age) understand A LOT more than we give them credit for.
My D was SO young when this started (16 mo bomb and 18 mo separated) that things are just beginning to change. Between the way she acted at the Dr. office last week to this morning, I can see that it is going to get tougher.
As she starts reacting to the situation, it is hard for it not to be a reminder of the hurt it is causing her.
That said, all we can do as parents is be there for them. Show them an example of a grounded, confident and strong human being.
BITS
Happiness is not something ready made. It comes from your own actions.