She can't take it any more and blows.

Her cocks swell within you and your twin but the two of you are to simply to much for her. She begins to pant and grunt with each thrust. Your twin releases your heels and you lock your legs behind your mistress’ back pulling her into both of you and shorten her strokes as she fills you. You can hear your twin Ayali below you moaning and she plants her hands on the ground and despite your mistress’ best efforts she lifts both of you up and back to **** your mistress to work harder to fuck both of you. Finally your mistress goes silent for a brief second and you know she is holding her breath trying to hold out a bit more. Then she can’t take any more as both of you in unison pound against her and she blows her wad. She rocks her head back and yells as she blasts forth a torrent of cum filling both of you with such **** that you are both slid forward across the floor nearly 3 feet and covered head to toe in cum. Ayali is the first to stand. She extends her hand to you and dripping cum you grasp her fingers lovingly and rise like some inhuman parody of sensuality and look on your master sitting on the floor with her eyes closed.