DOCP-274 "No no, you're inserting it, big brother! You promised just to rub...!" Before I knew it, my little sister had grown into an adult's body with huge breasts that made me lustful! Despite her words, her pussy was getting soaked. I inserted it raw w

I, the shitty brother who managed to make a promise with my sister to just do frottage. Her childish body from when we used to bathe together had long since transformed into that of a woman's, complete with huge tits, and I can't stop getting aroused! No way! Big brother! I'm only rubbing against you! Despite her words of refusal, my dick was soon sloppy wet with her love juices! I can't hold back anymore! Just like that, with forbidden live penetration, I fall into ecstasy with my sister's pussy…