When I woke up, I saw Styx again. "Wait. Why are you still here?"
"Oh, just to introduce you to my sister, Lethe."
"Hello, Percy," Lethe said shyly. As she said that, I felt my soreness going away, my penis throbbing again, my stamina coming back. It was probably because Lethe water made you forget. As a side effect of that, I guessed that she could go on for a very long time until she ran out of power. I also knew that it would be really good to have Lethe on my side, so I would have to cum in all three holes.
As I was thinking Lethe had started to undress while Styx, hips, swinging, walked out the door and vanished. She came up to me when fully naked and pulled me closer, and pressed up against me, and kissed me deeply. As my tongue explored her mouth, I was dimly aware of her erect nipples pressing against my chest and her curvy legs wrapping around my hips, her wet cunt pressed up against my balls, me erect dick trapped between us. As she pulled away, she looked down and sultrily smiled. "Can I help you with that?" She asked. I nodded frantically, as she was teasing with her hands. She took me in her mouth and gave an expert blowjob, somehow getting me harder. Lethe went slow and steady, but with an incredible amount of skill, making me forget every release I ever had, making all my cum come back in, making it the biggest orgasm I had had yet when I finally came, it was 29 waves, all into her mouth.
She rewinded my orgasms yet again, now bringing my waves up to 58, then laid me down and impaled herself on me, screaming as I broke her hymen. Instead of taking control, I let her have it as she slowly ground against me, whimpering and grunting. Her tight cunt wrapped around my thick dick better than any mouth, giving both of us pleasure. I discreetly made it even tighter, and my cock even bigger, so the head completely filled up her womb. She didn't notice this change, but the next time she came down, she moaned louder than before, and beads of sweat dropped down. It looked like she was having a hard time keeping it up, so I increased her stamina and horniness, then started to move on my own. Her hips gyrating combined with my thrusts drove her over the edge, she screamed and her cunt tightened, and while I didn't naturally come, I used my powers to give myself an orgasm. All 58 waves came into her cunt and womb, stretching it and making her stomach noticeably larger. While she collapsed, I quickly gave myself another quick orgasm and stuck my dick into her asshole, then came, forging the second bond. Then I fell asleep with my dick between her tits.