I tickle her feet for time with a timer. When she has enough, she gets exactly that much time with our hitachi want and not a second more. Repeat rounds until she can finish.
Also i enjoy having her on her knees bent over. Again with the hitachi. She gets pleasure until she cant hold still and then tickled for a while when she cant. She really cant hold still for the pleasure and i love it.
23 years married and still tickling