13th

AJ is wearing a saddle upon which Dash is sitting. AJ's tail is tied, giving everyone in town a clear view of her dripping marehood and Dash spanks her with a riding crop. Dash firmly holds AJ's reigns in her hooves as she guides AJ through town. (sound familiar? :p)

Applejack is tied spread-eagle (4 limbs to the four corners) on her bed. Dash is having rough sex with her with a strap-on.

Same scenario but Applejack is tied on her stomach, her front hooves tied together to the middle of the head of the bed and her back hooves are tied so she's in mounting position. Dash introduces strap-on to willing mare and in this position Dash can easily give AJ some hoofed spanks.

Rainbow is giving a blowjob to Soarin', while Applejack fucks her vaginally and Spitfire fucks her anally. Rainbows wings are also tied up (so, rainbow threesome)

Applejack and Dash kissing with the collar thing. Soarin' fucks AJ/Dash and Spitfire the other. Spitfire and Soarin' might also be kissing if the position allows it.

Soarin' is fucking Spitfure with Spitfire's back to his stomach. Dash is licking Soarin's dick and Spitfire's vagina while AJ goes to town on her with a strap-on. Spitfire is gagged and fitted with a nice collar.

AJ and Dash are tied together, stomach to stomach. Short leash between their collars. A double-dildo between them and a deep kiss. Gags would also apply. maybe something vibrating as well.

Dash and AJ are having sex in the woods. AJ is tied up and gagged but she sees someone approaching, could be a bad guy or one of their friends. AJ of course can't warn Dash so Dash just keeps licking her while AJ involantarily moans.