Let me add to Mike's point with an analogy.

Even the most earnest of nature lovers who advocate setting animals found in the wild free will take them in and nurse them back to health.

These people will NOT set an animal free into the wild when it is NOT in a healthy state. They realize this is not love, it is wrecklessness.

Once you take your spouse into your life, you have a reponsability to them. If they are hurt, and worse in the midst of a sleazy affair, the last thing you want to do is turn your back on them. This is not love in that case, its self-preservation.

There is a time yes that one has to decide if this person will allow to be guided to a healthier place. One can only fight for so long.

Tossing something vulnerable back into the wild isn't an act of love, nor is tossing a marriage-damaged spouse back into the street.