assisted cunnilingus
A situation where a third party assists with the act of one character performing cunnilingus on another, frequently without directly participating in the act of cunnilingus (although they may also be directly participating while also assisting another character, in which case it would also be tagged with collaborative_cunnilingus).
Like with assisted_sex, this could be either willing or forced.
Usually done by directing or controlling the head of the character performing cunnilingus.