Just having a wife and daughter doesn't necessarily make him less of a creep (I can think of a current high profile example of such a man). In fact, it could increase his creepiness, but I get your point. Anything that might "humanize" him, even a smidgen, is unneeded.
Of course, since we're planning on viciously disposing of him and Robert, it's all going to be moot in the end!
I don't doubt the writers ability to make Silver unrelatable even with a wife and daughter. Both hate him with a vengence, but equally milk him for everything he has.
I think the wife has more power over him than people give credit for - she insited he be home on the night after the bowling. Maybe daddy is financing the operation and she lets Silver mess about to a limited extent. Which would mean Christine would be left in the lurch at her whim.
The daughter could be a completly spoiled, self righteous, entitled bitch or just knows the agreement between mum and dad and makes the most of it..."daddy I want a new car or I'm calling Paul".
Silver walks in to find [player name] on top of his daughter, in the heat of the moment all he can think to do is kick him in the back, which only makes him aware of Silver, after getting on his feet [player name] and Silver start fighting in the heat of the moment [player name] grabs a lamp and smashes it into Silver's head, causes Silver to fall into a glass table which kills him almost instantly....
While your story line lets Silver off far too easily and makes me suspect you may actually be a Silver sympathiser, it reminded me of something I noticed testing out the ya...boat route.
During the scene at the hotel Silver tells Christine to call him Mike.
If you dig in the variables you will see a stat called MikeHorny this is the number in the MC's heart in the on screen stats.
So it seems the system name of both Silver and Uncle is Mike. Did the uncle's mum (and therefore Christines Grandma) work with Silver in the early days of her career and get pregnant by him, naming the uncle after her first love....you want conspiricies, I'll read between any lines even if they are not there.