On second thought, forget the tripping over the prized catcher's mitt part--it isn't plausible.
More likely is that at your niece's wedding you took your aged cousin for an ill-advised twirl on the dance floor (she did win a dance marathon contest back in '31) and she rolled both ankles, incapcitating her for exactly two weeks.
Go for it--I'll back you up all the way.
-Cousin Slotty