Though the couple went public with their engagement in October, little is known about the relationship between the daughter of the late grunge god Kurt Cobain, Frances Bean, and her fiancé, Isaiah Silva, frontman of rock band the Rambles. "We're each other's everything," Silva, 26, tells People about Cobain, 19, and himself. "We're homebodies. We don't go out to clubs so you won't find us stumbling out of them with Lindsay Lohan. We stay at home, read books and watch Arrested Development." Adds bandmate Mark Kuchell, "They're quiet and shy. They're a great couple. Frances comes to most of our shows that she can get into.