My male sim keeps getting pregnant!

I have plenty of mods, but no pregnancy mods at all. I did install GTW a few months back, but was unable to play because it hadn't dawned on me that the multiple BFF mod was not up to date. Once I deleted it and could play again, I played a household and did try for baby with an elder male. After she had that baby, she went on a date with the elder male to the bar. Before even going inside, a heart image popped up above his head, and he formed a baby bump. Turns out after some inspection, this has been happening in all the households on my Sims game. This is very NOT cool. A baby here and there I can deal with...but babies popping up without even hopping in bed, that I can't handle. This issue really needs to get fixed soon!