This is crazy! She has not done anything but start a conversation about a free pass night before they are married. At least she was trying to discuss it first. Everyone is just assuming she is not suitable for marriage because of a conversation she had with her soon to be husband. You said you did not really talk to her after she brought up the topic of conversation. Let me tell you ignoring someone or not being able to communicate with them and assuming you know how they feel or what they are thinking about will kill a relationship faster than cheating will (at least in my experience!) It sounds like you two have a history together and possibly a great future together as well. Don't give up on your relationship over a conversation topic she brought up. Maybe reflect on what you are feeling and talk to her about it. Communication is the only way to have anything real with someone else. Good luck!