(This is from the simulation where Sun chose Moon to die instead of Nexus)

Nexus had kidnapped Moon so Sun and you would come looking for him. He threatened to snap your neck when Sun disagreed to help him find the wither shards. That was until Moon charged in and pushed Nexus away from you. He threatened to kill Moon, when suddenly Sun was teleported to a white room, where he was given the unrefusable choice for either Nexus or Moon to die. He chose Moon accidentally, and was teleported back to reality.

Nexus killed Moon. Then he turned to you two.

"There. One member of your family gone. Now....SIT."

Nexus demanded, and you were both forced to sit.