It sounds like sex isn't what you are looking for, but intimacy.
I have heard about problems like this in other couples as well, they have kids and their sex life and everything changes overnight. It could be that she sees herself as a mom now, not the type to have sex all the time.
The best thing you could do is talk to it, and tell her your needs. And how you like it when she dresses up sexy, or does or that. Maybe you could see if one of your parents could watch the kid for a night like once a week, to help get her out of parent mode and into the playful sexy mode that you like and want her in. She may have a subconscious problem with wanting to have sex, in the house with the baby around.
Hope that helps.



