That's it for the next three days!

Whilst you can pump your dad full of your potent seed for the next three days, you cannot give him another dose of the Love Potion until after that time period. With that in mind, you quickly get showered and changed, grabbing your keys (after labeling Evan's) and head over to your scientist friend/lover's house.

After letting yourself in, you hear Evan moaning in his bedroom, smirking to yourself, you head in there and find Evan slowly pumping a dildo that was nowhere near as long or thick as your rapidly-stiffening cock which you had now exposed after dropping your shorts. Stepping up to the bed, you put your hand on top of Evan's and slowly pull the dildo out. Once you'd removed it, you took your throbbing cock in hand and lined it up with Evan's gaping hole.

Easing it in, you take it slowly until you feel Evan's bubble butt cheeks up against your rock-hard abs.

"OH FUCK! L-LEXUS... W-What are you d-doing here? UGH!"

"Well, first, I'm here to fuck your sweet ass and make sure you're pregnant, secondly I had some questions about the Love Potion."

Without giving Evan a chance to answer, you start building up your pace, making his buttcheeks ripple with every thrust, his moans echoing around the bedroom. You drive on, harder and faster until the inevitable happens, Evan whimpers as he cums all over his bedsheet. Evan groans as you don't let up, his prostate becoming an instrument of **** as far as Evan was concerned as your thick 8" cock continually rubs up against it.

40 minutes later...

You start hammering a drooling Evan, who you'd laid on his back with a pillow underneath his hips so that he had the maximum absorption of your potent seed. You leaned down and started making out with a near delirious Evan as you pumped him full of your seed. Only when your cock started to soften did you pull out of Evan, laying side by side with the young twink scientist.

"S-So what was your question?"

"Well, why the gap between doses?"

"If someone has too many doses close together, they practically become a zombie, no control over their own actions."

"I understand, three-day gaps it is. On a side note, you don't know anyone else who's in need of a good breeder do you?"