Cocoa, Mistletoe, and Ménage à Trois

After fleeing the attempted Christmas Eve matchmaking of one Molly Weasley, Hermione finds herself in the only wizarding café open drinking cocoa. What happens when two former death eaters walk in and find her alone? You'll have to read to find out. (Christmas one shot. Death Eater express writing prompt) Hermione/Thorfinn/Antonin