Complex sentence: Helsing and Seward make sure the child is alright and go into the crypt where the coffin is now filled with Lucy's body, though, as Helsing points out, it hasn't decayed a day since Lucy's death as the undead never age.
Split into simpler sentences: Helsing and Seward make sure the child is alright and go into the crypt where the coffin is now filled with Lucy's body. Though, as Helsing points out, hasn't decayed a day since Lucy's death as the undead never age.