VR is managed by a yandere sister who loves me so much, and I won't give my big brother's semen to anyone... A crazy sticky love forces me to over and over again

My younger sister Emma learns that I have had a girlfriend for the first time. "Your brother belongs to me, right? I promised to be with you when you were little..." From this day on, my sister has changed drastically and turned into a yandere, and I am being managed by her dark side... Starting today, I'll take care of everything about you. You can suck your big brother's dick! ? It's Emma's, so it's good. Are you about to cum? Ah, I like your big brother's face that looks so pleasant, show him more, more. I'll just keep it still, so I'll put it in like this... Her extraordinary love for me makes my sister Emma go crazy...and...