Therapy for the Supernatural

Cheryl just lost everything. Her parents were killed in an attack by rogues. Now at their funeral her mate is there with another woman. He's done nothing but cheat on her since they found out they are mates. Cheryl is tired of the pain his cheating causes her and even her wolf wants out. So in front of the pack she rejects him.
She leaves the pack lands and completes her schooling to become a therapist for supernaturals.
Eric, her mate or rather ex mate finds her as his wolf is dying. If his wolf and him don't find a mate in the next few months the wolf and possibly, probably Eric will die.
Is Cheryl strong enough to give Eric another chance?
Should she give Eric another chance?
There is truth in the saying once a cheater always a cheater and Cheryl would know since she helps many supernaturals and some of them have cheating mates/spouses.