Neither Liz or Amanda won, but the magic of the bet could not be denied. The one who came in first would have their torso above the horse body, and ties consider both as being first.
It was not immediate, the two having time to step away from yours and Maddi's shared body to see who won. Once they were next to each other, they were swifly pulled together by their naked hips. The duo moaned as the flesh squeezed against each others, then started to sink in, but to yours and Maddi's surprise and interest, only below the waist.
Liz and Amanda are first left on just a single pair of human legs, but that doesn't last long. First thry are covered in roan horse hair and the feet change to hooves. Then, their rear drastically blows up in size, prompting further moans, before the cheeks merge and grow a second pair if legs, muscle swiftly filling out the body.
Walking around the dazed duo, you and Maddi spot that they have both of their pussies as well as a third, presumably shared.