Catherine starts writhing underneath me even harder. Looks like I missed something. Mistress Barbara was stronger than me - but with Catherine it's safe to say that we are more or less even. I hear Catherine roar like a beast as she turns me over, sits on top of my strap-on and comes riding me as if I were a man. I scream as harsh pain pierces through my body. Catherine is riding me so hard that the strap-on starts rubbing my clit a bit too intensively. She slows down and squeals as the wave of long-awaited pleasure hits he. She falls down on top of me, her face and her tits all purple from tension. She can't stop cumming - she was waiting for this orgasm for so long and now she just can't make it stop!