When I work with couples impacted by ADHD I often see an unintentional bias towards using the label of ADHD as a negative descriptor, rather than as a medical term that enables treatment and describes a particular way of being. This negative labeling - used by both partners - hurts relationships. as it may lead to blaming the ADHD partner for ALL relationships issues, while providing too easy an out for non-ADHD partners who also play a role in relationship issues.
Statistics about how many couples are impacted by one or more emotional or physical affairs are hard to believe, for obvious reasons, not least of which is that estimates vary so widely. They range from 20-60% of men and 20-40% of women having an affair at some point in their relationship. No matter the exact number, the bottom line is that a large number of couples experience this form of betrayal at some point in their partnership, often after that affair has been going on for a while.