ok well feeling like you're dying, wanting to feel alive - isn't that classic depression symptoms?
I'm impressed that a. she admitted it promptly and b. that she says she needs to find out why she cheated on you. That is a person who is looking for answers. There may be some hope here.
And yes, the best person to talk about this with is her therapist. It sounds like she has a lot of trust in the therapist's opinion ("I will see what my therapist says" "if my therapist thinks I am strong enough"). That is good, because if this therapist is worth their salt they can help guide her through the tunnel.
I wouldn't put much stock in her showing or not showing. She needs to do some more baking (without the smokey treats) ...
It's a process. As painful as it is for us, I'm glad we are not them. Can you imagine? Ugh.
Loving kindness my friend xoxoxo
M 20+ T25+ S ~15.5 (BD) BD 4/6/15 D 12/23/16
"Someone I loved once gave me A box full of darkness. It took me years to understand, That this too, was a gift." ~ Mary Oliver