in terms of "dead dove" tropes in general one of my favourite ways to pervert an otherwise healthy and consensual relationship is to have one of the characters be responsible for something that was objectively and unsympathetically their fault and that they're determined to spend the rest of their lives making up for, but are unwilling (or unable) to confess to their new partner who only knows them as they are now and not as the shameful fuckup they once were, so they end up convincing themselves that they're essentially committing rape by deception - for the entirely selfish reason that is wanting to prove that they can succeed in obtaining and keeping one genuinely good, stable, unblemished thing in their life - by concealing it. but because they both desire comfort and don't feel that they deserve it they continue to do so, going so far as to try to prevent their partner from being exposed to any situation or interaction where they might learn the truth, even as it becomes a case of using them and the relationship to self-harm to satisfy their unresolved guilt that only grows with each passing moment.