Mishi,
I am quite late replying to this topic but I do actually have some experience and advice for you. Sometimes, when the brat and Top have been in relationship for a while the Top can get burned out. It happens. Maybe its because we're aging, maybe its because the brats or Tops needs are changing. Maybe the Top physically cannot do it any longer.

Step one. Talk about it! Be open! See if there's a work around. Alternatives to spanking like lines or corner time? Self spanking as directed by the Top?

Step Two. If that doesn't resolve it the brat may need a professional for a while or forever. The Top still loves their brat and holds the brat accountable. However, now you're answerable to your disciplinarian! And trust me, all those cute tricks you could pull to lighten up your punishment for your Top don't fly with a pro!

Its working for us. Its allowing us to concentrate on the love we have and the life we are building together.

If you want to talk further, give me a shout!