The lady clearly got on the cock of the sex-starved male! See with what pleasure and strength he fucks her, and besides when they started it was a bright day outside the window, and in the final shots of the video outside the window at night! How many hours in a row did he pull on the lady?
Seeing that the guy records it on camera - her girlfriend tries even harder. In addition, she wants to look even prettier - she fixes her hair, makes eyes, smiles. Knowing that the guy will show this video to his friends, she wants to impress them as best she can. Female logic!
Oh cool wah