selfcest without self

Selfcest where the original character is not participating in the action.

Could be genderswap on genderswap, multiple alternate persona or personifications/humanizations, clones going at it with each other, etc.

The original character may be present, but they are not involved in the sexual action.

Example

Two copies of Ainchase Ishmael - Richter and Opferung.
For comparison with default form, see the next thumbnail

Ainchase Ishmael's default form - God's Agent