Naked Russian chick came to have sex for the mood

As it is sung in the famous song, Love will unexpectedly come when you are not expecting a wife at all... Well, I manage to do something similar, but in fact, the sister of my beloved girl falls head over heels in love with me and comes to fully enjoy sex with me. So this girl is not at all one of those who needs to be persuaded to have sex - rather the opposite... That is why she first gives me a blowjob, and only then spreads her legs for further continuation.