Obi-Wan visits Padmé to question of Vader's whereabouts, and realizes that Vader is her husband and the father of her unborn child. When Padmé sets out to the volcanic planet Mustafar to confront her husband herself, Obi-Wan secretly stows away aboard her ship. After they arrive on Mustafar, Obi-Wan reveals himself and confronts Vader, who accuses Padmé and Obi-Wan of conspiring against him and uses the dark side to choke Padmé into unconsciousness. After a long and ferocious lightsaber duel, Obi-Wan defeats Vader by severing his legs and left arm. Obi-Wan watches in horror as Vader slides too close to a lava flow and catches fire; he then takes his former friend's lightsaber and leaves him to die. Unbeknownst to Obi-Wan, Vader is rescued by Sidious moments later and reconstructed into the cyborg as first seen in the original trilogy.