It was quite obvious that there was something going on between Trevor and Sypha. There was absolutely no chance the two didn't have even the time is crush on each other. Something in the way they looked at each other gave it away.
Both you and alucard realized that early on in this allyship. So, one night, out of boredom and thanks to the wine both you and Alucard had drank, you two made a bet. If the Belmont and the speaker weren't actually romantically involved, Alucard would win, and if the opposite was true, you'd win. And whoever won, got half of the other's gold.
After weeks of trying, and whilst out on camp with the three, you finally got Trevor to admit that him and Sypha were in a romantic relationship. And ofcourse, you totally ignored the late hour and simply run into Alucard's tent while yelling out his name.
"Well...if you're screaming my name like a lunatic...I assume it must be important..."
He smiled and glanced up from his book and at you. Maybe he knew you'd win...maybe he was planning on giving you a better price than his gold...