Jon realized he could use this to his advantage, to both have some fun and to embarrass Biff.
"Excuse me darling, I got to head to the bathroom, I'll be right back" jon said.
"Hurry back dear" Biff Said.
Jon looked around quickly making sure no one was in the bathroom and said "I wish Biff would gladly do anything I ask of him in order to please his new fuck buddy". The stone flashed and Jon smiled.
Jon left the Bathroom and decided to talk to Biff.