People with both a long love line and wisdom line usually have weak willpower and is often narcissistic.

They are generally not happy with their marriage or current relationship.
Therefore they are easily tempted by outside seduction ~
Clandestine love affairs with married parties could very possible happen in their lives.

If an island mark is also found on the love line, there may be a tendency to become involved in same-sex relationships after failed opposite-sex relationships.