Natasha tilts her head to the side, and the grin is replaced by an exaggerated frown as she pretends to think it over; weighing winning the bet against a month of blonde hair. "Worth it," she finally says with a decisive nod of her head. "But just barely."

She ducks her head and twists one of the cog wheels two times around its rod. "They dyed my hair back after two weeks that time," she offers, darting a quick look up at him. "Would've been sooner, but the mission was a bitch to finish."