Is liking necessary?

Yooki was pregnant and near to pop.
She Already posted the first part of the series.
But ball gags and Yooki are not really friends

At the opening of the session,
It is still bearable.

Time passing, drool comes
and jaws start to hurt.
Humiliation rises

Humiliation rises
and nipples tighten.

Drooling constantly,
she tries to push the gag out with her tongue

An hour later or so,
Yooki reachs the point of despair

If she had liked it where would have been pleasure?