Prompt: Kirk, McCoy - AU in which Jim has a twin (Sam)
Possibilities
"Lord save us there's two of them."
Leonard's shocked exclamation caused two identical, grinning faces to turn to look at him. Leonard considered the possible reasons he might now be faced with two James Kirks - cloning, transporter accident, alternate realities... On this ship, the possibilities were limitless.
"Bones!" The grinning Jim on the left said, grabbing the other Jim's arm and dragging him over to where Leonard was rooted in place. "I'd like you to meet my brother, Sam." Both men observed Leonard's shock with obvious delight. "We're twins," Jim added, unnecessarily.
"God, two of you?"
The Jim on the right - no, Sam Kirk - clapped Leonard on the shoulder and replied, "Yup. Isn't it great?"
Leonard noted that both men also shared identical suggestive smirks. He couldn't decide if he was doomed or if Christmas had come early. Time would tell.