On the other hand, if you mean The Sims 2, then this sort of story pales in relation to what you can get from Autonomous Casual Romance, especially if you happen to use a cheat that disables family checking on most interactions ("closer families" was the far too subtly named original version). Plots involving "Who's the other parent?" can easily be engineered (it's easy to keep *yourself* in the dark until the kid becomes a toddler; sadly Sims don't point and laugh at the resulting Prince Harrys).
Unfortunately you don't get the mad dashes to the hospital, and The Sims 2 mpreg birth is nowhere near as lulzy as the water breaking panel above, but on the other hand there is the work of crammyboy, which this comic strangely misses having anything like...
Wow, I wonder what the overlap between scans_daily and MATY was.