Andrea Lafferty, president of the Christian conservative Traditional Values Coalition, believes Ohio Senator Rob Portman should have told his son that being gay is “wrong.”

On Friday, Portman became the first GOP senator to endorse gay marriage. Portman wrote in an op-ed that he had a change of heart on the issue after his son, Will Portman, came out to him and his wife, Jane.

(Related: Senator Rob Portman reverses course on gay marriage.)

In a statement posted at her group's website, Lafferty mocked Portman's change of heart by equating being gay with drunk driving.

“My child is a drunk driver and I love him,” she quoted Portman as saying. “It is a part of his identity, who he is.”

“Therefore, today I am reversing my opposition to drunk driving.”

“My child is a drunk driver. That has personalized the issue for me and taken me above the whole discussion of the morality of it. It is now personal with me.”

After her satire introduction, Lafferty commented: “The tough part of being a parent is telling one of those young souls whom we have been charged with raising that he or she is wrong. But because it is tough that doesn't mean that we are excused from doing it or we can delegate our responsibility to a teacher or 'the village' or some other entity.”