They tell him the truth and invite him to join the fun

Ben recovers quickly after seeing his son “Michael, this is not what it seems”. Michael frowns “you are not letting my teacher shrink your dick and play with it?”. Ben blushes “Well, in that case it’s exactly what it seems”

Michael starts leaving the house, but Ben calls him out “Mike, do not leave, your teacher and I were just trying the endless possibilities of her app. You had already tried it but I was so curious”.

Michael seems sad rather than angry. “Dad, you know that I had to endure a month with a tiny dick because of that damn app and now you are playing with it”.

Ben frowns “Come on, son, you were behaving like a brat. You needed a lesson and Mrs. Fletcher just gave it to you. See how much you improved since then in all the senses. And, yes, I am very curious about the app, and we are trying several things”.

Michael looks at his father and laughs “You look so funny. Your balls are so big that it looks as if you do not have a dick”. Ben has still the SPH kink, so his son comments are making him erect. Michael laughs even more when he sees his father fully erect “Oh, dad, what’s that?. It looks even smaller than mine looked when Mrs. Fletcher shrank it”. Ben sighs “Mrs. Fletcher, please disable the SPH kink and restore my dick to its actual size”.

Jenna does as Ben asks but she is clearly disappointed. Why did Michael have to appear when they were enjoying so much? She was hoping to do something more with Ben but Michael has ruined any possibility of it happening.

Ben is also surprised by his son appearance “Mike, why are you here anyway?”. Michael sighs “Mum went to a party and I came here to see if you wanted to watch the match with me”.

Ben smiles “I am so sorry you had to see this”. Michael just shrugs “It’s ok. I get it. To be very honest it was very hot when Mrs. Fletcher made me cum in front of the whole class. I mean, it was very humiliating, but I get that it could be really hot if done in private like you are doing now”.

Jenna smiles at Michael's comment “Do you want to join, Michael? I promise that, unlike in class, you can select what you want to do. Also, I won’t tell anybody and I am sure you won’t tell anybody either”.

Michael hesitates, so Ben intervenes “Jenna, do to him, what you did to me the last time. Make him cum for a minute”. Jenna smirks “Good idea, in fact, I am going to do it to both of you. Michael, please drop your pants”.

Michael also undresses and Jenna starts fumbling with the app. First, she selects Ben, she makes sure he is in shooter mode and changes the load quantity for the maximum. Then, she does the same with Michael. After that, she goes to the cum function and programs Ben to cum for 1 minute. In seconds, Ben starts shooting huge loads. Of course, he is in such pleasure that he is screaming. Michael cannot believe his eyes “Wow, dad, that’s impressive”. Jenna does the same to Michael and he starts shooting as well. His loads are equally huge. Michael cannot believe the pleasure he is feeling and starts screaming as his dad. As ben finishes first, he is able to see his son screaming in pleasure. When Michael finishes he seems tired but has a big smile on his face. “Shit, that was awesome. I did not think it was possible to have an orgasm like that”. Jenna and Ben just smile at his reaction.

However, Jenna seems to realize that what she is doing is not right. She wants to be with Ben, but Michael is her student and this is really weird for her. It’s true that she had already used the app on Michael, but it was in class as a punishment, and now she is making it both for his and for her own pleasure and that feels wrong. So, excuses herself and tell Ben that she must go.

Ben tries to persuade her to stay for a while, but she rejects. She is not sure if they will meet again after this. He is the father of her student and, to make things worse, she really likes Ben, so maybe it’s better not to see him again.

When Ben and Michael are alone. Michael asks Ben if he interrupted something else. Ben smiles sadly "I think so, son. I really like your teacher and I hoped that, eventually, we could do something more than using the app, but after her reaction I think that's unlikely now".