Ever read any Tanya Huff? She herself is a lesbian, and her plots tend to have homoerotic elements if not outright homoeroticism. Her "Blood" series is good, her "Shadows and Ashes" series (might have that a little wrong--it's a spin-off from "Blood") even better, in my opinion.

I'm very fond of Charlaine Harris (anything by her, but you'd probably like her Sooky Stackhouse stories; she has a more recent series about a most unusual pair of "siblings"--they all have "grave" in the title and are delightfully wicked and twisty).

And Kimberly Harrison is amazing! Her "Witch" books are contemporary fantasy at its hot best. Two of her main characters are in almost eternal UST of the lesbian variety. Very hot.

I don't know if any of these are what you're interested in, but I enjoy all three authors and have never been disappointed by their writing.