Finish on her ass

With every thrust you feel your own climax come closer. Summer seems to have a constant orgasm, still quivering and screaming, and finally, you thrust for the last time and pull out, grab your dick and erupt loads of sperm onto her white buttcheeks, overshooting a few times to cover her bent back as well. You exhaustedly sink down besides her and kiss her shoulder while she breathes heavily into her pillow.