Her eyes widen slightly. "You don't think that's incredibly young for someone whom you're trusting your life to?" She sighs. "I know that you want to get better. I want you to get better too. But... I don't want to lose you. I worry that you're going into this half-cocked because you really don't care if you live or die."

Mary bites her lips to keep from choking up, though eyes do well with tears. "I'm sure it's awful to live as you do, and I probably have no idea what it's like, but... I would feel lost if you died during this, Bucky."

It's not that she doesn't want him to try whatever procedure Shuri has planned. She just wants him to be safe during it.