Mary Jo Eustace, the scorned wife Dean McDermott cheated on Tori Spelling with back in 2005, says she wishes him the best in treatment and beyond.
"My main concern at this point is the well-being and health of the son we share," Eustace said of Dean McDermott checking into rehab Thursday.
"I am also hopeful that from this point on there will be a dedicated effort to deal with this matter privately and respectfully, for the sake of all the children."
The former spouses, who divorced in 2006 after 13 years of marriage, are parents to one son, Jack, 15. Tori and Dean have four little children together.
Eustace, 51, a Canadian actress and TV host who wrote about the break-up of her marriage in the 2009 book Divorce Sucks, went on to tell People:
"I wish him only the best in his struggle to overcome the demons he has been wrestling with for years, so he can become the father and the man I know he wants to be."
McDermott, 47, has been the subject of cheating rumors since Christmas, when he allegedly cheated on Spelling, 40, with Emily Goodhand in Canada.
Goodhand came forward with the scandalous details after their tryst, claiming that Dean wanted sex from Tori more than Spelling was willing to give.
He did not overtly admit this, but said yesterday in a statement, "I am truly sorry for the mistakes I have made and for the pain I've caused my family."
"I take full responsibility for my actions and have voluntarily checked myself into a treatment center to address some health and personal issues."
Should Tori Spelling divorce Dean McDermott?