Always love the pairing of David X Rebecca X Lucy.
Instead of just doing David dick upgrade, you could do David fucking a limbless Rebecca. For context, Rebecca was changing her arms and legs after a fight with a gang. This mean she is like an amputee. Then David enters the room she was in, saw how naked she was with no limbs and things get spicy. Rebecca became a living sex toy for a few hours with David. Because Cyberpunk means people can change limbs as long as they have money, this means this is also a possible situation in that universe.