These are not the C4S sites Jim has mentioned, but these are the paysites that provide great muscle control material. I'm only listing a FEW names from the sites. Trust me, there's plenty more out there.
Herbiceps: http://www.herbiceps.com(This site has the likes of Melissa Dettwiller, Christina Rhodes, Christy Resendes)
Awefilms: http://www.awefilms.com(Jennifer Kennedy, Milinda Richardson, Lynn McCrossin)Muscletease: http://www.muscletease.com(Tiffany Ryan, Jamie Ford, Zarah Pacheco, Lesley Stamper)
FTVideo: http://www.genexmagazine.com(Melissa Dettwiller and a few others)
As more are discovered, I'll post them here. Please join these site and support them. Tell the site owners how much you appreciate their efforts to putting muscle control clips on their sites.
Muscle Control Sirens Founder
Her name is Tamara and I was lucky enough to enjoy some amazing pec bouncing in free chat
I didn't see anyone by the name of Tamara on the site, and this link is the wrong place to post it.
This needs to be posted here: http://www.musclecontrolsirens.com/apps/forums/topics/show/3113865-a-list-of-female-muscle-control-performers-there-s-a-lot-