One of the best-kept secrets in rock-and-roll is out.

The biological father of lesbian singer Melissa Etheridge's two children is none other than veteran rock star David Crosby, according to the upcoming issue of Rolling Stone magazine.

Notwithstanding his frequent drug and health problems, Crosby, 58, made the grade because Etheridge is a fan.

"He's musical, which means a lot to me, and I admire his work," said Etheridge, 38, in the magazine.

The children, 3-year-old daughter Bailey and year-old son Beckett, were borne by Etheridge's partner, Julie Cypher, who was fertilized via artificial insemination.

"No kitchen implements were involved," said Cypher, a 35-year-old filmmaker.

The family appears on the cover of Rolling Stone, along with Crosby and his wife, Jan, who recommended her husband as the donor.

Crosby, who has four children of his own ranging from ages 4 to 35, was not present at Bailey's and Beckett's births and has no parental duties, Etheridge said.

Crosby said he was happy to help. "Maybe it's a good thing for a lot of straight families to see that this is not something strange," he said.

Crosby, who is returning to the road this year with supergroup Crosby, Stills, Nash & Young, received a new liver five years ago and also did time in jail for drugs. But he says he and his wife have been sober for 14 years.

Etheridge and Cypher said they decided to go public because they were tired of the questions and wanted to live an open life.