[quote=@Bishop]
[@Prince of Seraphs] How about...

"Chronos jerked it so hard that his sperm flew right through the cracks of the prison and disappeared from the current timeline. The sperm emerged years later and hit an unsuspecting soon to be mother."
[/quote]

I think a large part of the point of putting him Tartarus was that as the Titan of Time he had to be imprisoned somewhere where time didn't exist so how well that would work I'm not entirely sure.

Beyond that though, aside from being kind of contrived there's nothing I can think of that would actually prevent it from working. Though you'd think with other titans in the prison Chronos would have someone to have sex with without having to resort to jerking off.