Sounds like ALL my friends after they got married. For some reason I have never experienced this. I'm on #3 (#1 & #2 are deceased) and they both kept up just as much after marriage as before.
Well to be 100% honest #1 never swallowed but she gave head at least 3x a week and also brought home girls frequently.

#2 was a swallower no problem before, during and after. We still came around after we divorced up to a couple weeks before she died.
#3 so far so good except she doesn't swallow 100% but gets a good portion down so I'm not complaining. lol