Shove your knot in.
From Create Your Own Story
You lean over to her ear and speak softly into it "Knocking you up was part of the plan." You chuckle a bit as you say it, pulling away from her head and replacing your hand from her breast onto her hip. She began to struggle with a new vigor. You are amused by these ineffective struggles, your arms easily able to keep her in place. You look down and wonder if your knot will even fit in her. She is already pretty tight around you.
"Only one way to find out." you think to yourself as you pull back. With a grunt you slam forward and begin to press your knot onto her already stuffed cunny. "Oh hell no NO!" she bellows, partially at the feel of her womanhood straining open around even more mass than before, but mostly out of fear of pregnancy that may be caused by your imminent ejaculation. "It's not gonna fit you fucker! Just pull out now and I won't report this!" You continue pushing forward and growl "You would be amazed what can be accomplished with a little-" you are cut off when your knot finally pops into place "-force..."
Burst after burst of hot sticky liquid fill her belly. "Oh god... OH GOD! You're not! Please tell me you're not! No NO!" She began to pound on your chest as you continued to fill her.
But as you came close to finishing you wonder what you want to do next.