(CNN) — Two of the late President Ronald Reagan's children are taking opposing stances on same-sex marriage, as Supreme Court justices weigh a federal ban prohibiting marriages between gays and lesbians.
Michael Reagan, a conservative author, defended a controversial op-ed piece warning of a "slippery slope" after same-sex marriage approval during an interview with CNN's Piers Morgan on Wednesday.
"I think it does send a slippery slope," Reagan said. "I think if you accept the redefinition of marriage then you're going to have to accept the redefinition all the way down the line."
In the op-ed, Reagan argued that making same-sex marriage legal could result in "a very slippery slope leading to other alternative relationships and the unconstitutionality of any law based on morality. Think about polygamy, bestiality, and perhaps even murder."
Speaking on CNN, Reagan said similar questions have been posed in courtrooms without angry backlash from same-sex marriage proponents.
"When they're posed in a court of law to a solicitor general or to someone else, there's no outcry. There's no outrage," he said. "But if I quote or I use those same words in an op-ed piece, that are being used in courtrooms across America, somehow there's all this outrage that is out there."
Michael Reagan's stance is a far cry from the views of his half-sister Patti Davis, who told the New York Times her father would have supported allowing gays and lesbians to marry.
In the article, Davis recalls a friendship between her parents and a lesbian couple who once babysat the Reagan children.
"I grew up in this era where your parents' friends were all called aunt and uncle," Ms. Davis told the Times. "And then I had an aunt and an aunt. We saw them on holidays and other times."
"We never talked about it, but I just understood that they were a couple," she continued.
On CNN, Michael Reagan also recalled friends of his parents who were in a committed same-sex relationship.
"I have friends together 40 years. Forty years they've been together. Great Republicans. Great friends of my dad. My God, I've been with these people for 40 years, love them to death," he said.
"The reality of it is, I don't believe in gay marriage, as many people don't believe in gay marriage. I think you can have a debate on that. I don't believe in it. I think it does send a slippery slope," he continued.