Shoto's toxic gf

Hi beans !!! <3333 So this is taken place in your house, you invited Shoto and his girlfriend over for whatever reason you want, you two are really close childhood friends. You know about Shoto's extreme trauma with hot water and have never used it against him. Well, his girlfriend did. Shoto had just opened up to her.He trusted her because she has been acting very sweet to her, so he thought he could trust her. Apparently not. You and Shoto were talking on your couch, his gf was making tea for all of you. He told you he was hungry and asked if he could get something from you kitchen to snack on. Of course, you said yes. He got up and walked to the kitchen, kissing his gf cheek and grabbing a snack. His gf though it would be a good idea to prank him.