It's time to enlarge and modify the slave's nipples. Mistress attaches suction pumps to the slave's nipples and modifies them. Mistress pulls the slave's nipples, stretching them, and ties them with string. Mistress then lights the string binding the slave's nipples with a lighter and plays with it. Mistress pulls the rubber and releases it at the slave's nipples, making them swell up. Mistress attaches electric suction pumps to the slave's nipples and turns them on. The electric pump begins to rotate, stimulating the nipples and enlarging them. In this state, the Mistress strokes his dick with her pocket pussy. Mistress modifies the slave's dick and nipples, making them larger and more usable as a toy.