She knew what she was doing (handjob).

As you were considering how best to get your cock into the Elvish whore behind you, her hand swept through the water like a snake, striking with fantastic precision, wrapping around your cock and drawing a gasp from your lips as her other locked onto and massaged your cum-loaded balls. Her strong legs locked yours in place as she jerked you off swiftly. Her slick breasts were pressed hard against your back, every inch of her water-soaked body shoved against yours and her lips were whispering incomprehensible obscenities in your ears, when they weren’t nuzzling, suckling, or nibbling on them.

Your hips began to thrust up, into her hand as she jacked you off with all the expertise her eternal life had given her. Her feet slid up the inside of your legs, to form a triangle under your balls as she stroked your cock, up and down, a fingernail scraping deliciously along the bottom of your head, provoking a loud moan from you as she nibbled at your ear and ground her wet, bald cunt against your back, writhing her tits against you.

Her hard nipples and silken, but firm breasts pressed against your back as she writhed against you, soft skin and firm muscles rubbing you, as her hands tried to pull the cum up from your balls and her lips never left your ear, whispering words that, from their tone had to be truly filthy. Warm water sloshed as the whore slipped, slid and masturbated you. You groaned as you felt the seed rising from your balls and her hands kept moving, spurting your cum up into the warm water that surrounded you as you moaned loudly under her nimble manipulations. Your hands clenched on the side of the tub as the heat rose from your balls and shot out, filling your entire body with a pleasant warmth.

Finally, your muscles relaxed and you leaned back against the Elvish whore, enjoying the feel of her breasts heaving against your back as you slowly regained your composure.