I don't think we have a huge problem...and everything in the marriage is going pretty well except that my wife doesn't seem nearly interested "enough" in sex, ever since the birth of our baby who is now 9 months old.

Any pointers on how to bring this subject up, without really insulting my wife? I've tried hints, and have outright said "how come we only have sex once a month now?", but nothing changes. I guess she doesn't think it is a big deal....but personally, I'm tired of looking at porn and want my wife's sexual desire to return. I'm also mildly concerned that I would have difficulty resisting an affair, if opportunity happened to present itself (I wouldn't go looking though).

I know that our new child and her weight gain are both factors. But neither of those things has diminished my desire nearly as much as it has apparently diminished hers. And when we do have sex, we both still enjoy it and find it fullfilling.

Again...not much else negative about our marriage, but I'd like to address this situation before it becomes a bigger problem. Advice?