I like the way you think, anon. Hopefully these are okay!!

Tommy is resistant to the idea of regressing in front of Techno because he doesn’t like showing that kind of vulnerability to him and he thinks that he won’t get it. 

But surprise, Techno is a regressor himself (albeit a pretty different one than Tommy, but still), and picks up on Tommy trying to keep himself from slipping pretty quick. 

When he approaches Tommy about it, he tries his best to be gentle about it and not to scare him off, but still comes off a bit awkward and stiff on account of him having poor social skills in general. 

Tommy gets defensive at first because he’d gotten so used to the idea of Techno Finding Out = Bad Bad Things, but he cools down about it after Techno doesn’t push it and just says that there’s a standing offer to take care of him if he ever needs it and he has some time to process. 

When he eventually does let himself slip in front of Techno, he doesn’t announce it. He just waits for a quiet moment where they aren’t very busy and waits for him to notice. 

When he does notice, Techno doesn’t really make a huge deal about it, just shifts in demeanor so he’s softer and more protective/caring. 

Tommy is significantly more subdued than he is when he regresses around Wilbur or Tubbo or his other friends and family.

Phil stops by for a bit while Tommy is regressed, and takes it extremely in stride, because he’s pretty used to Techno regressing and is thusly already familiar with the concept and knows how to act. 

Techno takes Tommy to the turtle farm because he gets kind of antsy and he likes the turtles and likes having something to do.