I think Jon is having problems being a "Dad" to "8" kids. He's only "32". That's his problem. Kate well, I think she likes money, she also wasn't too nice to Jon on the show at times. Who knows what really went on. To me it's up to them if they want to keep going on.
If Kate was caught spanking her daughter because she didn't mind, so what. Good for her. Their is nothing wrong with spanking your child to correct them. That's why there is so many kids that get into trouble and don't respect authority.