What category am I supposed to put a bisexual story in?

[NuminousMessage]

I wrote a story about a married gay couple involved sexually and romantically with a woman. The content is MMF sex with a lot of heteroromantic aspects. I'm not seeing a bi category, either, assuming I'm looking right. Where is it best to submit this story?

 

[NuminousMessage]

Upon further reading, it at first seemed Group Sex would work, but apparently MMF content gets trashed. So I'll put it in Gay Male.