Todd Grimshaw

[Dazzle]

I do think if Billy discovers Todd knew all along and was part of it, he will end their relationship

I agree that will likely be his initial reaction, but I hope he listens to Todd's side and realises the latter felt he had no choice and at least tried to protect his family and Sarah. I think in real life Billy wouldn't continue to have a relationship with Todd (even if he had some sympathy with his situation), but people are far more forgiving in Corrie's universe.