Treading the Boards, Book 2.
Review of Treading the Boards, Book 1 here.

Heat Factor: Sex is frequent, explicit, and hot.
Character Chemistry: Even though Sarah is the only one with any sense, I completely believe her relationships with both Meg and James who are both ridiculous and moderately annoying.
Plot: Let’s navigate a threesome, plus an evil pimp.
Overall: A welcome change from standard regencies.