Discreetly, she unzips, allowing the anonymous black cock to spring free, already hard and eager. She hungrily takes it into her mouth, her tongue swirling around the head, tasting the pre-cum that beads at the tip. Her husband's muffled voice on the other side of the wall only heightens her excitement. She blows him, her head bobbing rhythmically, her hand working the length she can't fit into her mouth. The stranger's groans of pleasure echo through the gloryhole, encouraging her to suck harder, faster, until he can't hold back any longer, exploding into her waiting mouth.