"Sorry sis, but she needs a little help," you say with a shrug. You step forward and place your hands on your sister's rear end, being careful not to let her kick you, and look to Maybel.
The mare appears to wink and you, and you take that as a cue to push. You shove on your sister's butt as the horse takes another gulp and sucks down her hips and rear end with you hands still on them. You hear her muffled yells from inside the eager beast.
With the next gulp...
