(Potential spoilers for Chapter 13 ahead).
I've experienced threesomes a few times, but I feel increasingly aligned with Paige Hawthorne's statement that the MMF combination has the advantage of being "easier"… and therefore probably more straightforward to write. There's so many moving parts!
Apologies for the delay in posting the most recent chapter of Resonance: my travel, return to work, and the challenge in writing that threesome scene delayed delivery. However! The remaining chapters are complete, and you can expect to see them posted here over the next few days.