Lookout, unless you were with him 24/7 I'm not sure how it's possible for you to know what are his feelings for Julie. What do you think would happen?? The red tops brandishing the headline "Family Killer Throws Tantrum Over Ex Lover?"
I don't really think I'd be best pleased at being holed-up for 34 years on a whim and I'd have more than thrown a tantrum. The whim being that he dared to drop her for someone else

Revenge can be dangerous.
Julie was the one who threw the tantrum until she realised that she'd bitten off more than she could chew. No wonder she broke down on the defence stand !