Perfect finish in the last scene: fucks Nikita doggy in the shitpipe, cums on her asshole, re-penetrates her backdoor with cum as lube, atogm'es Valentina so she can clean the cum and ass juice off the cock.
16:06 perfect positioning and posture from Nikita: back arched, ass stuck out backwards, arms forward to stabilise into back thrusts. Professional shitpiping at it's best.