Life of a 13 year old- Dump your load inside your sister, despite knowing she might get pregnant.
With the last of your restraint gone, you hold her hips tight, and with a final thrust, you push deep into her fertile womb and release. Your shaft fattens up and you felt your sperm rush down it’s center. Your cock head swells and bucks inside her uterus and the first load fires into her. You feel more and more sperm flow down your shaft. Spurt after spurt of your baby making seed jets into her insides, coating her box in your love. She groans softly as your jizz fills her womb, stretching it to bulging as you fill her. Finally after your orgasm subsides, you give your penis a few more pumps to shake out the last few drops, and pull out and run to your room and fall fast asleep.
It is now 8 am and the sun shines bright. "Hurry up and wake dear!", your mom shouts as she tosses a nice suit in on your bed. "I want you dressed and ready to go by 8:30. We just arrived at Mexico!. Go wake your sister too, I have to freshen up as well."
You: