[Story] MILF in Hot Tub Transforming into a Horse (Patreon)

You went with your friend and his mom on vacation. You're staying at a remote Airbnb. It's your first night there.

Your friend drove into town to pick up stuff for dinner. You and his mom decided to try out the hot tub. She got in first.

It was a Hot Tub Horse Machine™.

Her nostrils flare and she snorts loudly. Her face starts stretching outwards. Her breasts rapidly swell, pushing her bikini top out of the way.

Then she looks at you. A strange look. A fearful expression evaporates into one of lust. "Come on in," she beckons, "the water's fine."