After reuniting with his mother, his father was confused as well by what was going on as Xander did say that his mother would lose her original body.
He didn't care about any of that for now and just held her tightly. Xander later went to find Sandra and he saw that her father too died.
He noticed a gun in the man's hand and he figured out that he killed himself.
Hearing the door close, Sandra turned around and as she saw Xander, she stood up and immediately hugged him tightly placing her head on his chest.
She cried loudly at this scene.
Yes, her father was a bit of a madman himself but he was still her father who had showered her with love ever since she was born.
She couldn't help but let out the tears and Xander only kept quiet as he held her dearly. Just letting him be there for her was enough.