Infidelity Support Group
Any relationship in which one partner engages willfully in sexual relations with another outside of the partnership is considered to have experienced infidelity. This breach of trust is often traumatizing for the faithful partner as well as the relationship, and support is often needed to heal emotionally and to decide whether or not the relationship should continue after...

no - i wasnt saying they weren't getting it at home - i was more referring to the common excuses for infidelity - that "something was missing" frim their marriage - or that they were fulfilling a need (ie praise, attn etc) ... i agree that their void will never be filled - not by cheating anyway - because it is an internal emotional/psyc prob that they have... one that will only be healed with some seriously genuine introspection and sage counsel.
Would it make a difference if he HADN'T done it with her or if he'd only slept with her 3 or 4 times instead of 5 or 6? BTW, IMO, that is probably a lie. 5-6 more likely means 10-12. But,again, that doesn't matter.