I know this is niche but over on Trillian I have had this kind of duel with two other mothers, twice with one, four times with another and the competition was very... enjoyable
Basically myself vs you, both with a breast pump & a set time limit.
We trash talk or roleplay the duration and at the end we send eachother a photo of the bottle to see who managed to produce more milk.
A real contest over who's materially stronger.
If any other mother are interested you know where to find my trillian.
I'm not always active because family commitments
but I always welcome a challenge.
Oh and if others have had similar experiences let me know in the replies.
I'm undefeated on trillian so far, but if any one tried this irl I would love to hear more.