While IAFD is pretty good, it's not always the most accurate or complete. As in this case, Bang.com says that the scene comes from "My Thick Black Ass 16" and that the other chick is named "Hoover".
A horny little hood rat has come by to play, and there are two throbbing dicks just waiting to be serviced. With her mouth stuffed full, her pussy is getting reamed from behind until her friend jumps in to rub that horny slit! This group sex fuck is packed with hot black butt action!
www.bang.com
But that movie isn't even listed on Chastity's IAFD page and there is no chick named "Hoover" listed in her screen pairings either. As a matter of fact, one of the dudes in the scene is Dwayne Cummings but according to IAFD he and Chastity don't have any scenes together.
And with older Black porn movies it's often hard to find pages with screen caps that will allow you to actually visually verify that it contains the scene that you are looking for. A lot of the older movie pages only have front and back cover pics. However, after some searching I was able to find screen caps for this flick. Apparently, the other brown skinned chick is named Alyssa and Hoover is a light skinned or white chick that joins in as well. Alyssa isn't listed on Chastity's IAFD page either.
www.hotmovies.com