Initially, Paxton and her husband, Danny, discussed adoption before realizing surrogacy was an option; they successfully created several embryos before Paxton started chemotherapy.
Paxton's sister, 33-year-old Morgan Williams, said she wanted to be the couple's surrogate.
"I wanted it to be me, selfishly," Williams told KTLA. "As an older sister, I want to protect her, but I can't protect her from cancer. So I kind of just stepped up and was like, 'OK, if this is what I can do, then I will do it.'"
Last week, Williams gave birth to twin girls. Paxton is also now cancer-free. She and Williams have discussed possibly doing this again, they told KTLA.