Athletic girls persuaded guy to have group sex

The hobbies of two cute step-sisters are fitness and visiting it. Even today, beauties are torturing themselves as hard as they can on exercise machines, when their tight asses are noticed by their brother, who is trying on sweet asses for his dick. Afterwards, he invites the beautiful couple to have a little sex with each other, and with such slender figures this is not a problem at all - if only they had the desire, but it looks like all three have it!