19f - sex in parking garage during finals

i was just getting done studying for finals and it was super late, like 11pm. my bf at the time was waiting in the parking garage for me in his car. i walked out (wearing leggings and a hoodie for reference) and got in the car with him. we were both super tired and just kinda asked how our days went and didn’t have the energy to waste time. he goes “i could really use some head” and im like “i gotchu” and just reach over, undo his pants and pull him out half hard already. im stroking him kinda lazy while we talk and he gets more bricked up. he gets most of the way there and im like “give me a few” and drop my head and go down on him. i go slow but messy, get him super thick and he’s like “i need to put this shit in your pussy” so im like say less and pull my leggings and panties down just enough to show my ass and sit on his dick reverse style. i bounce on it for a few minutes, he’s all built up and can’t hold back so i lift off, and he shoots up my back and ass. we clean up with a gym tshirt he has in the backseat and i just go “yeah you definitely needed that” lol