How cute they both are to me, that wouldn't be revenge, maybe it would be a reward depending on the tastes of Gillian's boyfriend.
What I would do is kidnap the boyfriend, tie his hands to a tree, put a cow skin on him, insert an Electroejaculator into his ass, bring a bull for him to ride until he is satisfied and the boyfriend is almost dead, then extract all the bull semen mixed with his shit and insert a tube into Gillian's mouth and make her swallow it all, that would be horrible revenge, it was too much for all maybe I should moderate myself?