Her

Your dick doesn't care, besides you need to get to gym class and you can't do that with a hard cock.

You pick her up and press your enormous cock against her tight pussy, you still push it in with ease and start fucking her. You work against your cum inside her when you try to push as deep into her as possible, as you reach the deepest part of her womb she's almost filled up already. Your cock only gets harder as you pull it out while forcefully to make cum spew out all over the room and then push your hard cock as deep as possible again. You continue this process multiple times, squeezing as much cum as possible out of your cock and pushing the cum you blast as deep inside her as possible.

Her womb can't take anymore cum but you're still horny. You do the same process again, forcefully removing your dick to make cum blast out of her pussy, this time while putting finger inside her asshole. She's filled to the brim again and you can almost get your fist inside her asshole as you push your dick inside her tight hole, as you push your cock deep inside her asshole you notice sperm flowing out of her pussy. You take multiple pair of cum stained panties and push them into her pussy, making it harder for the cum to flow out.

You've finally filled both her ass and pussy to the brim, making her stomach expand like she was on the verge of having a baby.