Melissa and Tammy Etheridge are separating, according to a statement from Melissa's publicist. The couple exchanged vows in 2003. In 2004, Melissa was diagnosed with breast cancer. Shortly thereafter, in 2006, Tammy, 35, gave birth to their two children, son Miller and daughter Johnnie Rose, conceived through an anonymous sperm donor. Melissa also has two children, Baily, 13, and Beckett, 11, with former partner Julie Cypher. The Etheridges asked for "consideration and respect for our family as we go through this difficult period."