It will be bad, whatever happens, if Liam finds out. I hope it won't lead to death because too many games present death as a choice & there's enough of this in RL, without introducing it to what is meant to be an entertaining escapist sexy fantasy. Murder & suicide are also very real options in an unfaithful partner scenario. It's apparent that many fans are young & may not have experienced the disintegration of a marriage, or long-term relationship, (I'm talking years of living with the same person, kids etc.). I could be, (& hope), I'm wrong but this makes me think that they might like Liam out of the picture in whatever way it happens. There is no gung-ho attitude available to those in a divorce situation such as this, even for those who, on finding out, manage to make love to someone else within days or weeks of the break-up, this is not the start of some wonderful new-found 'freedom.' Imagine that Liam discovers Sophia has been in a 'liaison" with Dylan. Doing nothing would not be an option. Killing his wife & son, then himself would be at one extreme but remember that those poor folks in such a situation are not in their right minds. [I'm fully aware that we're talking about pixels here & no actual person will be harmed but nor will there be "ahegao" faces all round.....I HATE ahegao faces!].
There are numerous strong emotions generated by this unfortunate circumstance which should not be under-stated, even in a game. We are talking about one of the most traumatising of experiences, which regretably is very common.
If & when Sophia's faithlessness is discovered it will be a mighty challenge to L&P's writng skills as to how it is handled. He has shown great story-telling ability on occasion but there have also been many examples of superficial writing. I hope the former prevails in this future scenario, unless of course, Liam never finds out.