Thread:Moose513/@comment-25372003-20160929000217/@comment-25372003-20161014213710

It is:


 * A Narrow Gauge Mothers' Day: Karen is sad that she doesn't have a mother to celebrate Mother's Day with anymore, but Fred, Steve, Joe, and Daphne decide to cheer her up by taking ehr with them to a Mother's Day feast with the Narrow Gauge Engines when their mothers come up for a visit.

(And you might not know the Narrow Gauge engines' mothers because they're original characters)