THIS
That was the appeal of these series.
When you have a family that always acted like a normal family, and then, something starts to change, and some taboo gets broken, THAT is the point of it, and that's what makes the scenes hot when the sex finally happens.
But, when you have everyone mindlessly fucking everyone everywhere, it gets boring, like most Jab's comics are getting nowadays.
Look at Sharona's family, they all acted like a "normal" (well, more or less) family, and then Angus, who was sexually frustrated with his wife, started having sexual thought about his daughter, then as time passed, first the shower "incident" with Sharona happened, and after that, when Angus got rejected by his wife once again, he went "fuck it!" and decided to give it a go with his own daughter.
Similar situation happened in Wong's family, with Wong being first weirded out by thinking about his mom sexually, and then started getting sexually attracted to her.
Now this crap is rewriting everything, with Angus now all of sudden treating his daughter like trash (when he was first showed acting like a caring father with her in the previous issues), then turns out that he apparently fucked her since she was even younger like it was no big deal, and they all knew Wong's family since both Wong and Sharona were children, and who knows what the fuck will Jab retcon next...
I am really starting to think that this is Jab getting petty at fans of the series, ruining the comic on purpose.