Deal breaker

"Marcus," Vincent whispered, staring blankly at the name on the screen. "Why are you messaging her?"

Vincent tried to open the message, but her phone needed a passcode. He tried the old passcode he knew, but it failed. He tried again, but again, it failed. 

"Did she change the passcode?" he muttered, his irritation growing. "Why did she change it? What is she hiding?"

Vincent tried again, but when it failed again, a countdown appeared on the screen until he could try again. He had always known the passcode for her phone, even though he never borrowed it. Fil never gave him a reason to check her phone. Moreover, he respected her privacy. 

But he never heard her saying she changed her passcode. 

"Marcus…" Vincent ground his teeth, his face twitching, his mind running wild. "Don't tell me he's hitting on her behind my back?"