If you've been meaning to read this, you can now get yourself a copy. It's sort of a post-portal fantasy - it's about a home/school for kids and teens who have come back to our world after spending time in some other world (a different one for each person). There is both an asexual character (the main character) and a trans character. I'm iffy about the ace rep, and the ending kind of bugged me, but the overall idea was interesting enough that I'll probably be reading the sequel that's coming out in June.
Virgin nerd hero, experienced madam. Snowed in, crumbling castle/lodge in Cornwall. Sparks fly. And there's a couple of Irish wolfhounds.
Bold Seduction - Karyn Gerrard This was the story that made me fall in love with the author's writing.