I don't see this as a derailment at all, for the record.
It may not be direct answers to the original questions, but it's exploring the ways a new baby interacts with existing relationships with people other than the co-parent, so is all good. Let the thread be what it will!
Me, 30ish bi female, been doing solo poly for roughly 5 years. Gia, Clay, and Pike, my partners. Davis, ex/friend/"it's complicated." Eric, Gia's husband. Bee, Gia and Eric's toddler.