A girl claims she is d by a long time friend but she never said no, do you count that as ?

I have a project to do for one of my cles and is a short dialogue only story about a man named Stuart in a police station because he was accused of by his best friend Meredith. She never said no according to him, and she didn't fight him but she never explicitly said yes. Is it , and how should it be handled? Honestly I have no idea, so some feed back would be great,