This could get interesting if it delves into why she's tired of her own life and the premise of wanting to make someone else happy (in this case the MC) is interesting in terms of what could possibly drive that. Like you don't just get bored and want to go to the lengths of giving someone the perfect life like you just bought a new video game (beyond that how many people even think they're capable of that). And there's nothing to hint at her secretly liking him (she said anyone).
Also I feel like he's going to regret saying "revenge" and that's where his first hesitation and disobedience comes in. Hopefully it doesn't get too murder porn weird.