 Liza chose Dr. Jake Martin to be the sperm donor/father of her child; however, Liza's ex-husband, Adam Chandler, was jealous of this arrangement and secretly purchased the sperm bank and substituted his own sperm donation for Jake's, thus making him Colby's biological father.At the time of Colby's birth, both Liza and Jake believed that Jake was her father and, thus, the child was originally named "Colby Marian Martin.