What are the traits for all three sims?
Control the son, (and as the son) click the father and look into all social options, specifically friendly category. "Beg Forgiveness" (not apologize, my bad) SHOULD be on there.
It'll go away in time (I don't know how long). But you have to keep the sims occupied/away from one another so they don't fight again and reset the timer. It might be good to turn off autonomous stuff for a bit. If you leave autonomy on, I recommend at least turning it off for the sim you're currently controlling. And of your household, be more careful about the father & son because the son is a risk for starting stuff with either parents cause of the mean streak, but the father's mood is gonna plummet every time he sees his son while he's got the sentiment and it may prompt him to autonomously yell at his son starting the whole thing again.
The sentiment WILL go away in time but you really have to make sure they don't fight again. Apologizing/beg forgiveness will help speed it along.
As far as the whole dad yelling at the wife, it could've honestly just been an autonomous action done selected cause the sim was in a bad mood. Personally, I find that once an action has been introduced to a sim they tend to repeat it more autonomously if left to their own devices so you may just want to spam some flirty/friendly stuff to kind of give the AI something else to focus on. I'm not an expert on Sim AI so this may not be a thing but idk.
But mostly, spamming flirty/friendly social actions could potentially give the couple some positive sentiments that can promote better autonomous actions between them.
Last option is to use cheats to get rid of the sentiment. Video of how to do that here: https://www.youtube.com/watch?v=AXLpNgF6Ljg
