More, by All Mores
Tinnean

Robin Dorincourt is something of a playboy who enjoys nothing so much as flitting from one boyfriend to another. He doesn’t poach, though, and when he finds himself attracted to St. John Ashford, he does what he can to keep a healthy distance between them, using taunts and teasing. It’s difficult, until he realizes his brother is in love with someone else. Robin’s path toward St. John is clear, and he makes his move.
But is his path as clear as he imagines? St. John might be as attracted to Robin as Robin is to him, but he’ll be damned if he allows himself to be passed from one brother to the other as if he’s nothing more than a poor second choice. Now it remains is for Robin to persuade St. John he’s no one’s second choice.