Actually, she has much better stamina (i.e. lungs) than me, so the only logical conclusion was to propose that she become my Saturday/Sunday morning jogging partner.
7 a.m. we set off at a prospective pace, 8 a.m. we were back - exactly one hour. And we weren't even trying. I'm sure she could go straight to half marathon distance at that pace right now, she wasn't even out of breath.