Open Question: If my wife is already into biting and spanking, how do I know how far to take the kink in our relationship?

[feedcrawler]

When my wife and I were first married our sex life was pretty vanilla. We've now been married just over 4 years and have since expanded our sex life to include her biting and spanking me. She even has learned to accept my foot fetish. So, now I am just wondering how much further the kinkiness in our relationship might possibly go. The sky is the limit as far as I'm concerned.

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