Nothing interesting, but when John comes home, he is welcomed by a surprise

It was a long day for John. He wanted to use the app on many occasions but he limited it to only for few minor changes. He made his math test much easier. Why would he fail a school when he has the solution for everything? He also made his math teacher wear an unprofessional dress and be more openly forwards to her students if you know what I mean. Carl, his bully, was giving him hard time, so he shrunk his penis by half. Aside from that, his day continued as usual.

The school was over and John walked home. When he came home he spotted his sister's schoolbag is already there. He also noticed a pair of men's boots. "My sister has a boyfriend's visit."

He heads for his room. He knows when his sister has a boyfriend over, they use to make noises. As he is about to open his room's door, he hears a loud moan coming from inside his room. He slowly pushes a door open and peeks inside. And there he spots them. His sister is standing on all her fours on John's bed. And her boyfriend is kneeling on the ground with his tongue buried between her butt-cheeks.

"Oh! It's so good. Lube my ass for him." Kate moans. John can see as she blushes from the intense sensation her boyfriend is giving her. " Clean my dirty hole before John gets home. It needs to be prepared for his lovely cock. I cannot believe it's the big day for my bro."

Eric continued to lick around her asshole. "Yes, right there! That's the spot!" She moaned in pleasure.

John stood there, paralyzed by a scene he was witnessing. 'Should I try to let them know I'm here? Or maybe it's a good time to test app capabilities and spice things up a little bit.' John thought as he reached into his pocket where his phone was.