eventually they take a back seat sort of, even going into the chapters in the 80s. they're still scheming but Su no longer lives with them so they are somewhat in the background for now with more developments elsewhere: soon after this chapter, the mother and daughter pair will try to assassinate the MC on her travels, where she happens to find General Lin as well and he soon discovers she is in fact the divine doctor's apprentice. They make a deal where he helps her deal with her toxic family drama and she will help him with his 'sick' father. Shortly after that she handles things so that she and her mom can leave the household, the mom either divorces or amicably separates with the dad; either way she leaves on HER terms, and meanwhile this does not work out so well for the evil sister as she thought it would. The MC, now moved out, opens up her own medicinal clinic and she is removed from the Su family registry. General Lin helps her with her business and also just likes to find excuses to hang out with her since he likes her. There'smore happening from there but the point is it isn't always the way things are in these early chapters.