Post set 3 takes place after before Luna post set 3 (see naughty Luna archive). Celestia punished Cheerilee by giving her to Naughty Luna for a few days.

Post set 30 was a cross-blog post for Cheerilee's garden.

On the foalcon arc-

Cheerilee was meant to have a physical relationship with Snails in secret (it was another cross-blog idea), at his behest. She, out of a slowly degenerating mental state, stopped thinking anything was wrong with it.

Once her niece Pinchy came out as an early blooming pervert, she had no hesitation in allowing the oddity occur.

To this Cheerilee, it was somehow replacing her lonliness. Filling a hole. 

That said, no, she never touches Scootaloo. Cheerilee never initialized these encounters, just agreed to them.

Lost history-

Post sets 15-18 were meant to give the audience a snapshot of Berry and Cheerilee's childhood. I never got the chance to fully expound on it though.

What it was, in short, was that their mother was and alcoholic sleep-around, and their father was physically abusive to her in fits of anger.

Cheerilee always protected the younger Berry Punch when their parents were fighting. The portion never shown was that Cheerilee once got angry with Berry for being a drunk (in their shared adult lives) and hit her. After realizing she'd become her father, she internalized a lot of guilt and pain.

After being with Naughty Luna, who was to be revealed as a remnant of Nightmare Moon, NLuna got inside Cheerilee's head and became a manifestation of her guilt and sorrow, called Demonilee. NLuna's end goal was to use Cheerilee's mind to escape her caves. However, Cheerilee beat her nightmare realm.

There was more to it but it never got finished, so the idea is slightly undercooked.

Likewise, Cheerilee is unable to bear children. This upsets her, especially after her drunkard layabout sister Berry got pregnant, and married later on.

Lost conclusion-

The character Selena. The final arc of the blog was meant to show Selena coming in and out of Cheerilee's life, and filling a much needed romantic role for her. However, by sheer circumstance, nobody else ever sees Selena. After a while, Berry and Minuette were to start questioning whether or not Selena was real.

With Cheerilee's lonliness and loose mental stability, it seemed to be a valid concern.

In the end, Selena ends up being real. However, she is Celestia in disguise, and the reason she keeps disappearing is because of her royal duties, and trying to not get caught.

The blog was supposed to conclude with Celestia and Cheerilee shipping, and Cheerilee dealing with her problems.

Also, they were meant to have a brother, Concord, but I never got to it. Like many things.