The Drake/Hastings/DiLaurentis Family: Veronica is married to Peter and their children are Melissa and Spencer. However, we recently found out that Spencer's biological mom is Mary Drake. Mary Drake became pregnant with Spencer after she slept with Peter. Peter slept with Mary Drake because he thought that she was actually Jessica, who he had had an affair with. Jessica was married to Kenneth and their children are Alison and Jason, but then we found out that Jason's biological dad was actually Peter. In season 7, the identity of Charlotte's father was finally revealed and it was none other that Ted Wilson.
The Marin Family: Tom was married to Ashley and they had Hanna. Tom and Ashley then divorced and Tom remarried Isabel who had a child called Kate. Isabel became Hanna's step-mom and Kate became her step-sister.
The Montgomery Family: Byron and Ella were married and they had Aria and Mike. Years later, Byron and Ella got divorced, but then they got remarried.
The Fields Family: Pam and Wayne were married and they had Emily. Sadly, Wayne died in Season 6 and we're still getting over the loss.
