Heidi was, by this point, off in a world of her own arousal.She was too focused on Tracey's mouth on her cunt and clit to notice anything else and she tightened her grip on Tracey's wrist as she knelt over the girl. She didn't even hear Katie's rather loud moan as she came on top of Ginny.
So close, Heidi let her mouth hand open slightly and her head tilt back. She was on the verge, "Oh Merlin, Tracey...I'm going to come..."
Tracey's pleas were what finally sent Heidi over the edge and she moaned quite loudly as she came. She stayed knelt over Tracey for a few moments as she caught her breath before moving down straddle Tracey's waist and, still pinning Tracey's wrist, began kissing her, still panting lightly.
Being caught up in her own world, Tracey didn't notice how Katie had now moved off of Ginny and both girls were staring at her, no doubt from her display of her dominate side.