Try and explain

It was a bizzare sight, a werewolf explaining as best he could to the woman a third his size the events that had led up to his forcing himself on her. Through the whole explanation, Amy kept rubbing her belly, feeling the gallons of semen sloshing around inside with every breath.

Through your knot, your semen continued to flow into her at a trickle. Between the time you began and the ten minutes it took you to describe what had happened between finding the book at that shady pawn shop and grabbing her, her stomach had expanded several more inches, and she was in some real discomfort now.

"Arg...why won't it go down already...?" The size of her womb was pressing on her organs, making her breathing a bit more difficult as she looked at you with pleading eyes. You shake your head "I don't know. I'm not even sure why this body seems so bent on putting this much in you. By your smell, you're already pregnant with quadruplets." Her eyes grow wide as she hears those words. "WHAT?! But...but I'm on the pill! I shouldn't be ovulating, either!" "I don't think magic cares whether you are or not..." you say, not sure what else you can tell her.

Her head flops back onto the bed, the shock evident on her face. You try desperately not to think about how she'll look pregnant, her tits growing and filling with milk, and fail. The resurgence of your desire goes unnoticed by her, though, as she begins scratching her skin and fidgeting. "Now what...?" she moans, the itching obviously getting worse. You recognize the signs a bit before she does and the pain hits, her pussy spasming around your enlarged cock to painful results.