To start, it does depend on where your relationship was before marriage. If you were both swingers / hotwife / cuck before marriage it would be unfair to expect that dynamic to change afterward unless you both were just done with it.
If you, as a married couple decided to try it, hopefully you discussed ground rules before entering the lifestyle. And if you've been doing it for a while and one of you wants to stop, then there is a discussion to be had. But each the cuck and hotwife have a decision that is all their own. You can stop / continue, and stay married / get divorced if the other partner isn't seeing things the same way.