A man's car brake down, outside a small Town. He go into the nearest br too call for help. In the bar (a lesbian bar) he is attacked by a woman, and he knocks her out. He carries her to her home and forces her to change to become a bi.
I also thing that the women has a slave (bdsm) living with her.
Quantam Mechanic is your author, the story Breakdown and one sequel are located at http://www.asstr.org/~QuantumMechanic/tigershark/index.html
Breakdown is also found at https://storiesonline.net/series/725/the-life-and-times-of-galen-cuvier but not the sequel.
Unfortunately, he hasn't updated since 2009, more's the pity.
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