A question for Pro-Choicers

I have a question for pro-choicers. It involves the holy and infallible right to bodily integrity. My question is in regards to conjoined twins. When most people think of conjoined twins they think of one being removed from the other because both would die, or both being removed because both would live.

However there is a third case, the case where if left together neither would die, but if separated the weaker would certainly perish. So here is the situation. On the one side you have the strong twin who can not lead a normal life because he is attached to his brother. He can live a life, perhaps even a long one, but he can not be free of the "leech" of his brother on his bodily integrity..Unless of course he can convince his brother to die for his right to bodily integrity. On the other side you have the twin who is equally distraught by invading the bodily integrity of his brother. However he is thankful for the chance to live and eternally grateful to his brother. How horrible then would it be for a doctor to come up to him and say "we are going to remove you, a process that will certainly kill you, in order to make your brother's life easier"

Keep in mind the weaker brother would have no say in the matter. This is exactly the same scenario as an abortion(if we assume personhood of the fetus, which we are because we are analyzing bodily integrity)

Thoughts?