Teds wife and her shrink boyfriend…forgiveness?

Anyone beside me unable to forgive the Teds wife? Yeah,myeah, its a show. But at end of season three arent we supposed to be forgiving as Ted moves back in with her and reunites the family? I cant. I instantly despised her character the second it was revealed she was banging the therapist. He is dispicable, and she is unforgivable. The subtle undertone of him probably being involved with her during or before she and Ted did couples therapy. As a persons whose spouse left me for the lawyer theymused in our divorce, i was highly offended by the characters in that storyline and the two characters are irredeemable in my eyes. It was so well written because i expererinced something similar in my own real life and it brought back emotions, as good entertainment does. But in real life, if I was Ted, i could never forgive her for the post divorce revalations of infidelity (assumed- denial not believable). I dont think her should have in the show.