The effect was immediate, once Penny had the stone she could feel how much pleasure she was giving Mika. As she rubbed her little squilidens feet she herd, "Oh god... my feet that actually feels real nice.... oh Penny your kisses.... i love that tongue its so, tasty........ oh god ever since we..... did it.... back at her old house she seems to want to go for bigger penises instead of putting multiple ones in the same orifice...", that's Mika for you being analytical even while having sex. "oh.... so big... so so big... its stimulating all the nerves in my insides... if it were my choice... I'd go back to the many penises.... but god i could never say that." she herd Mika think, as a moan was pushed through her mouth. with the rings on her labia every thrust made the pull a little on her pussy lips adding just a bit more to Mika's pleasure.