IENF-242 Feeling pity for my useless self, my beautiful sister agreed to let me do 'so-koku' (frottage) with the promise of just rubbing. But we both felt too good, and her pussy was completely soaked! So I slipped it in! "What!? It's inside?" But I could

A man who is defenseless gets excited about his defenseless appearance! Even though I know it's no good, I can't hold back and masturbate to my older sister. However, I was noticed and it made me feel awkward! ``When a man cums, he has to let it out, right? I'll help you get it out,'' he said, giving me a hand job and a blow job, but he couldn't get enough of it, and said, ``I can't put it in, but it's fine if I just cosplay it.'' ?