Why are we just assuming Helen & her mother know about the cheating allegations? I highly doubt Helen was sat in hospital waiting for her c section, and happened upon the messages (dating back to October) and at the exact same time Chet ‘seen’ the comments on his photo (5 days ago, at the time) I think it’s very likely only Chet is aware of Sam, and at this point he probably has deleted the messages from Helen’s phone. The only other scenario is that Helen is somehow aware (either by the coincidence of seeing messages at the exact same moment as Chet, or Chet having told her) and she’s either confident he didn’t disappear for a period in October, have an extra inhaler or anything else or he’s convinced her otherwise.Yes she would, but Chet is seemingly having banter with her so there doesn’t seem to be any underlying tension.
if there was any bad blood I don’t think Chet would be choosing to record himself jokingly taking the piss out of Helen’s mum.
There has been nothing to suggest Helen is aware. We only know that Chet is aware. Who knows if there’s any truth to it, ultimately only mystery Liv can prove it and it would basically take undeniable evidence otherwise it’s just hear say.