The wish wasn't specific enough

Felt Jon's lips on his as he gave him a kiss. "Hell, Jon, what are you playing at?" said Pete, staggering back. "Oh, come on, Petey baby. I didn't hear you complain last night" "Last night? What are you on about? Jeez, I wish I knew what you were on about." Suddenly, the rock glowed and Pete understood. He had said "I wish that Jon wasn't dating Karyn, and that it was me instead" and the rock had taken that to mean that he was dating Jon and not Karyn! He felt Jon's hand on his behind. "Come on, Petey, liven up" "Yeah," added Karyn. "You know how happy you've been with Jon ever since you realised you were gay. I've never seen a more suited couple." Pete had to think fast. He had not only turned Jon gay but he had made him and Jon a couple and everyone thought that he was gay too!