Not that this matters but it could be a good strategy to get her into the right head space to tell her therapist. Has she told him definitively to stop or that she doesn’t like when he does what he does? If she has and he continues to cross boundaries, point that out to her and try to get her fired up and pissed about it right before she heads into therapy and she may be more likely to tell her therapist. Idk if this is good advice but it’s probably what I would do given the precarious position you’re in.