5years ago when I was 27 I had a collared sub who was down for absolutely anything I wanted. She was 21 and was always ready night and day to serve and worship me. She would do anything I asked. She would constantly hound me though to let her eat my ass and finger my ass and maybe work up to pegging me so as a reward during one session I let her eat my ass and finger my ass while she was jerking me off. It was actually enjoyable. It felt amazing and I was going to cum until she overstepped and got greedy. She tried to put too many fingers in me and I had to punish her. So the next 6 hours consisted of clit and nipple torture and orgasm denial. She learnt her lesson that night.