This exotic-goods caravan visited the RT Miitopia/Gracie RimWorld colony with a lovely lady named Kristen. She’s a jogger, she loves the ocean and apparently, she’s Jeff’s ex.
I like to imagine it’s a “we held hands in the school hallway for a week, then broke up” situation. They had -15 opinions of each other though so it was presumably a less-than-amicable separation.
Anyway, since the caravan was an exotic goods trader, they sold bionic hands. So now John’s got a left hand again. Hooray!