The rule in counselling, Spath, is to take everything the patient says seriously, and keep your scepticism to yourself. Allow them to talk, and to feel free and safe to do so. They aren't there to be judged, nor as witnesses to a possible crime.
Your comments are the exact opposite of this. I have no idea if this person has repressed memories of abuse or if they are making it up, but the simple fact is that at this point it doesn't matter. The feelings they are experiencing are, it is safe to assume, genuine. So we should listen and be respectful, and give open and honest advice. Seeking a counsellor in their real life is the most important first step at this point. It won't lead to a family break-up.
If you aren't capable of recognising what is and is not appropriate advice, Spath, then please can you refrain from giving advice at all. What you're saying is potentially even damaging.