They had a one night stand

 Sinclair was disoriented; his head was pounding, but he struggled to organize his thoughts.

 

 His eyes darted around the room to realize it was different from his bedroom. What was he doing here and how did he get here?

 

 He pulled his legs to the side of the bed and that was when he realized he was naked and his clothes were littered on the floor. 

 

 What the fuck? He struggled to get on his feet and gather up his clothes while trying to piece his memories together. Last night, he went out to drink, and then he came across Jessica.

 

 Did he end up hitting off with her last night? Sinclair wondered as his eyes went wide. He wore his pants, then his hands brushed through his short hair; what did he do?

 

 His eyes spotted a note on the side drawer which he curiously picked up.