ikr, it's just hentai logic, but that's supposed to stay in hentai and we can genuinely enjoy even the worst ntr lmao anyway the girl has 0 resistance meanwhile the ML gets the cockblock energy maxed out, it's kinda unfair
there's also dialog where she says "no, not that place" "ah, stahp" which indicate it was done by someone else, so the lone exercise theory isn't very sound