I’m sorry, but I reject this categorically. Infidelity is actual infidelity, not “credible risk of infidelity.” Life itself is a credible risk of infidelity. If there is no actual infidelity, then the person being “uncomfortable” has a problem. This problem shouldn’t restrict the other partner’s autonomy.
If this is the level of control governing a marriage, then it is–in my opinion–an unhealthy marriage.