Looking for suggestions - ffm threesome relationship with drama?

[PornyAlt]

So, I would like some suggestions for stories with these broad "setup": a relationship between a couple that eventually involves a third person (with two women and a man - could be fm or ff at the beginning), with tension, drama, reluctance, cuckqueening, stuff like that, I want a focus on the feelings of the people involved. Preferably with a positive spin, but not necessary. I suspect that some stories could be found in the Loving wives category, but I usually avoid that because I'm not interested in the classic cuckold scenario (but I'm fine if it is a cuckqueen one). Incest is ok. Thanks in advance!