Well, I was only going to make the sex better, rather than giving any lasting bonus. In practical terms, that means you get half again the chance to knock them up if they're fertile.
Of course, being in jail, they should probably get a weekly chance of getting knocked up anyway. This is Crossgate, after all.
I'll see how things look once I get some of the bigger items removed from my worklist. I don't want to add anything major if we're going to stabilise things.