Might someone help with a delicate French translation?

She needs to talk to her husband about this, and let him know that she knows about the affair. She needs to let him know that he needs to "come clean" or she will leave him. If they decide to work it out, they need to visit surviveanaffair.com and marriagebuilders.com. There are also French translating services on the Internet, if sending the letter is what she really wants to do...