Former Buffy The Vampire Slayer star David Boreanaz and his wife Jaime Bergman are trying for more kids.The pair is desperate to give son Jaden Rayne a little brother or sister, and are waiting for nature to bless them with another baby.Boreanaz, currently starring in U.S. TV show Bones, says, "We'd love to be blessed with more children. We'll see what happens, but hopefully."