He gives it his all

Putting down his phone, Josh places his hands on Monica's hips as she starts to move faster on his cock. Bouncing up and down, Monica shudders in pleasure every time his cock pushes against her womb.

"Oh god, oh god, oh god! It's happening! My big brother is going to get me pregnant!!" Monica moans loudly as she leans forward, her hands gripping Josh's legs.

Seeking even more pleasure as he impregnates his sister, Josh rushes forward while still tightly holding Monica's hips, surprising her and sending her on all four.

"Josh? What are you- Ohhhhh!!!" Whatever Monica wants to say gets cut off by her moan as Josh starts hammering her inside out.

"You still ask what I am doing? Isn't it obvious? I'm gonna put a bun in your oven! One so big that all of your female friends will feel jealous of!" Josh grunts as he furiously thrusts his cock into Monica's pussy.

As the siblings-lovers mate like a pair of wild animals, Monica moans uncontrollably, her arms wobbling as she can no longer hold her own weight. Not one to let his prey away, Josh instintively grabs her arms and pulls Monica towards him. Moving his hands to her breasts, Josh gropes Monica's breasts and twists her nipples, making his little sister moans even harder.

"Take it, Monica! Take it! You will become the mother of all my children! There won't be a day where I will let your womb empty! So! Just! Accept! It!" Josh punctuates each of his words with a hard thrust into Monica's cunt. At the last thrust, he holds her tightly into his body as Josh explodes into his sister's, filling her womb with another load of his seeds.

Cumming at the same time, Monica's hands clenched her brother's arms tightly, else she crumples into a wet and sopping mess on the bed. "Yes! Yes! Yes! Yes!" Monica repeats the word over and over as she rides out the climax.

The horny siblings spend the rest of the morning in each other's embrace, with Josh pumping load after load of cum into his sister's womb non-stop. By the time they stop because of exhaustion, it is already late noon.

"Oh god, I can feel my womb overflowing with your cum. I can say beyond doubt that I will definitely become pregnant." Monica mock-complains as she lies on the bed, hand on her pussy to prevent any leaking. "I know you missed your chance with my high school graduation, Josh. But I think you have just made up for that and more with this one. Right at one of my most fertile days too..." Monica says dreamily.

Hearing her words fills Josh with utter pride. What she said basically confirms the changes he made is working. Monica is no longer on birth control, and she is even on her fertile day. Josh is confident that he will see a heavily pregnant Monica come the graduation, and he can't wait for it. He makes a mental note to bring a camera to commemorate the event.

"All of this sex makes me hungry, and I am in no power to cook lunch. Do you think you still have enough energy to drive us someplace near, brother-lover? Or would you prefer a delivery?" Monica asks Josh, making him remember that he did make her skip school this morning, and both of them obviously haven't eaten anything all day.