Rebecca smiled as she begged for harder.  She bit her nipple before then raising her head and looking down at Emiko.  "You want it harder, I'll give you harder"  she sat up and thrusted harder into Emiko at the same time using her free hand to bring down on her exposed hip and ass in a loud spank.  "mmm baby...yes... squeeze that strap on." she kept thrusting hard and slow wanting to make her beg more.