"Throughout his life, he has been singularly the most kind, thoughtful, compassionate of all my children," Dr. Stephen Welden, Welden's father, told "20/20," of his son.
"I think that's why he wanted to go into medicine. It's just ... devastating now," Lenora Welden, Welden's stepmother, said.
Welden was charged with murder, but under a deal, he pleaded guilty to charges that could land him in prison for nearly 15 years. Awaiting sentencing, he is currently under very strict house arrest.
For now, Welden is the only one paying the price, but according to his plea agreement, there may have been an "unidentified co-conspirator" at the pharmacy Welden obtained the pills from. Charges have not been filed against the pharmacy or its employees.
The pharmacy did not respond to a request for comment from "20/20."
Lee's lawyer, Gil Sanchez, said Welden could have faced a life sentence under the Unborn Victims of Life Act, if it had been in place in Florida.
"Remee, along with her supporters, is going to assist and try to develop grassroots political support to pass that law in Florida," Sanchez said.
Lee said she has reached a place of peace for Welden.
"I am just a girl from Lutz that fell in love with the wrong man."