Sometimes I wonder if the writers do all this intermarriage, sorasing, disappearing family, just to play games with all of us, hoping we won't notice when they really screw up.
Let's not forget the the "out of the blue adults, who suddenly show up as unknown sons or daughters of major characters. Truly amazing.
Recently it's been Gwen, product of a one night stand Jack had with some waitress (which I do not believe for a second). Then there is Tripp who showed up same way for Steve a few years back. Melanie was a surprise for Daniel, who was a surprise for Maggie! Most of Stefano's offspring showed up unexpectedly, some after he was dead, like Chad, or Stefan & Jake.
Kate doesn't seem to have raised any of her children except for Lucas.......Austin, Billie, Philip, Cassie, Rex...... Plus has had sex with any and all available men in Salem. Plus having been married to Curtis Reed, Roman, Stefano, & Victor. The lady.........whoops, she is definitely no lady...that woman really got around. (Austin, Billie -daddy is Curtis. Philip's is Victor. Rex & Cassie have Roman as a Daddy)