Mmm-kay. But this is a fast t/l and I haven't seen the show (although I checked the Fate/Stay Night dictionary at http://lab.vis.ne.jp/tsukihime/dictionary2/01agyou.html), so some of the stuff may not quite be right...but there ya go!
Or rather, the fact that he was able to fill up Saber's enormous magic power with just his own sperm...the Emiya-kun are something to be feared.Rin, it's been a long time. You seem well.Where the hell have you been and what have you been doing?!Don't tell me it didn't all convert into magic power and so the extra sperm implanted themselves in her so maginificently...That might be great for you guys....But I'm sure that the other masters will challenge each other in battle...the time may come when I'll have to...A lot of stuff happened and we got delayed, but we're home!No...I'll fight, too. They say "Motherhood is strength", so we can think of this as a power-up--I won't be in the way, right?So Saber ran out of magic power halfway and, with no other choice, you just had to do it with her...?Um, about that...I can't believe a Heroic Spirit like me who was placed into a body gets to experience a woman's joy...I may give up searching for the Holy Grail.