Roy Mustang is the type to joke about marrying Riza Hawkeye for tax benefits. Hawkeye is the type to take it seriously. Penciled in that day at 4pm so she can be home to feed Black Hayate at 5.

Mustang still thinks it’s a bit until they’re signing papers. He tries to joke about how lucky he is to marry a beautiful woman to hide how he’s freaking out. Hawkeye tells him that, with all due respect, they’re already destined to spend eternity together in hell, so might as well make the paperwork easier.

She signs the papers and leaves Mustang standing open-mouthed in the office. They never talk about it again.