“Rainbow, what are you-” Fluttershy asked in her soft, gentle voice, surprised by her friend’s sudden shove, her words cut off as her back softly hit the rough bark of a convenient tree. Immediately, the sapphire-skinned pony’s body was pressed tight against hers, pinning her to the tree, their faces just inches apart, her firm, perky tits mashed against Fluttershy’s massive, mouth-watering watermelons, azure nipples poking into the soft, sensitive flesh. “...Oh, my.” Fluttershy breathed in surprise, eyes going wide as they saw the look in her friend's eyes. The rainbow-maned pony wasted no time, one talented hand coming up, fingers sinking into one of her plush, pillowy breasts, thumb and forefinger unerringly seeking out her nipple and giving it a sharp tweak. Fluttershy squeaked with surprise at the sudden intensity of the sensation. Her thighs twitched, trying to squeeze together as the sensation made her slit hum with excitement, but found their movement blocked by a well-placed athletic knee, keeping her legs apart. The reason became apparent as she felt a second hand on her skin, sliding down over her embarrassingly chubby tummy.