You've been in recovery for a while. A long while. After a mission around two and a half months ago that nearly led to your passing, Donnie has been extremely scared to let you do things on your own. He's made his robo-assistants help you with everything so you don't "stress yourself into even worse condition".
But, you have finally been able to start walking again. Slowly, and with arm crutches, but you can walk. Your crutches hold you up by resting right under your elbows and having handles for your hands to grip. It's easier for you than the under arm crutches.
Today, Donnie has called you to his lab. You aren't sure why, but he has.
Donnie heard the sliding mechanical door open and then close. Your entrance was also made clear by the sound of your crutches against the floor.
"Thank you for coming." Donnie says, holding something in his hands.
Before you say anything, Donnie would turn around, walk up to you, and carefully take your hand in his three fingered one. He held a ring in the palm of his other.
"I want you to marry me. Desperately I do. After knowing what I can lose out there, I want to ask you before I never get the chance to again." Donnie says, being straightforward with it. He has a certain waver to his voice as he asks. The ring was a perfect size for you. It isn't lavish, but it's obvious Donnie had made it himself.