I have to "one up" you.
My wife is "fixed", so pregnancy is not even a possibility.
However, just about 8 months ago my wife started having throbbing pains/burning "down there" after sex. Now we've been married 9.5 years and this was brand new. She, over time, has developed a weird allergic reaction to my cum (confirmed by doctor).
On top of that, she gets severly irritated with latex, so condoms are out.
So, for the last 8 months its sex and then the "pull out" method of "birth control". I have been married for nearly 10 years now, have 3 kids, and all of the sudden when we are done having kids, can't ever "finish" in my wife again.
So, all I'm saying is...it could be worse?