Problem with romantic interactions

I'm playing a multi-generational family and suddenly my sims can't try for a baby or do most romantic interactions. When I click to try for a baby they reset and the romance bar goes up. I figured I'd download a family from the gallery to see if it was a problem with my family or in general. The family I downloaded from the gallery works fine. I don't know how to fix this. Does anyone have the same problem or have any ideas on what to do?