=) I don't think they mind the snarry. I think they are counting on it as much as we are! :3 If it weren't for snarry... I shudder to think where they would be!
But nevertheless, an apologizing letter goes a long way! =) It would never do to have Snape angry - he is the type to withhold sex when upset. And what else is snarry if not the sex? :3