Jamie, it's hard to turn off the responsibility of mothering and get into the mode of lover/wife. I had my husband cheat on me when my daughter was 6 months old. He wasn't getting the attention he craved, so he thought my love had stopped. we also had an extremely demanding business going where I handled the phone and appointments; so my days were taken up with that, and my nights were interrupted very often by my daughter. I was sleep deprived and was only to give a small effort to my marriage. The outcome of his cheating, caused me a long time emotional hurt that was just devasting to me and to our marriage.

Set you wife down and talk to her about your needing more personal attention. Please don't do this to her when she is trying to focus on mothering. She cannot
be divided in two on this front....the child is seemingly more demanding; but evidentally she doesn't know she is dealing with another needy person who wants to run away to get attention. I'm sorry about this last part...but waiting on a guy lots and lots pre-children...and then when you can't give him the attention he had gotten...he feels like the grass is greener somewhere else. Just my take on it Jamie!!
bj