Working on fleshing out the mutual_impregnation tag; multiple choice: which of the following does mutual_impregnation include?

1) Both characters impregnate each other in the image
2) Character A impregnates character B while currently pregnant with B's child (e.g. https://e621.net/posts/2001029)
3) Character A impregnates character B after having given birth to B's child (e.g. https://e621.net/posts/2658290)
4) Character A impregnates character B and promises/requests that B impregnate character A (e.g. https://e621.net/posts/2637943)

For whatever reason, my brain says 1, 2, and 4 count but not 3 -- but I have no justification for this, and I'd like to hear others' thoughts.

I'm also not sure what to do for https://e621.net/pools/22885 -- the narrative clearly shows that the characters impregnated each other, but the impregnation happens in different images, and I'm not really sure what to do for an image like https://e621.net/posts/3012488, where they're mutually pregnant but no actual impregnation is occurring.

javertgirl said:
1) Both characters impregnate each other in the image

Just this part is what sounds more intuitive IMO ¯\_(ツ)_/¯

I'd go with 1, the rest sounds too complex and specific '3'

Only #1. The other three shouldn't be mutual impregnation because only one is getting impregnated.

Gotcha, that makes sense! Thank you.