Maybe she didn't feel like it?
Personally, I wouldn't wanna bang my wife, if she wasn't into it to, & I certainly wouldn't want her to "service" me. Being married & having kids throws a damper on things, so it's probably not that tragic.
Lighten up Needto, you've just experienced what every other man does in the first 6 months of a relationship. You should be happy it went this long.