So have you thought about any action that you can do immediately to turn things around? It sounds like you are somewhat giving up if you claim she's going to be your wife for the next 40 days. Don't claim that, claim back your marriage.
Get out there and start doing things for your wife. Start by rushing your wife over 2 dozen roses to her job today. Tell her to give you a few months to prove to her that you want her back! I know she's very hurt and upset, but sometimes people divorce only to find out they love each other and that can be the worst pain.
I also want to commend you for admitting your fault...that's a good start. You see, going through IVF, the women suffers the most b/c not only are you being poked with needles constantly, you go through mood swings and you are feeling uncomfortable with all the prodding from the Dr's and nurses and it can be a vicious cycle. Not only that, you are dealing with seeing other couples getting pregnant quickly and starting their family while you are struggling with taking fertility drugs that are not guaranteed to work....there are so many levels to this emotional ride. I also know it's hard for you to see your wife going through this pain and sometimes even feel jealous b/c the process seems just about having a baby. A woman's need to be a mom really can superceed all emotions when you get to that place. That need is something we can't sometimes control, it's nature. So for a short period time, it's something men have to understand. I know it's hard, but it's a part of being a women.
So you see, you have some work to do.
So lets hear what you are going to do! I'm being hard on you b/c I'm hoping things work out for you both.
I look forward to your update.

__________________
Me - 38 (PCOS, Both tubes blocked)
DH - 37 (everything is fine)
1st IVF Dec - 2006
2nd IVF March - 2007
3rd IVF
Nov 20 - 1 healthy egg transferred on 5th day
1st beta - 33

(Nov 30)
2nd beta - 47 (Dec 3)
3rd beta - 28 (Dec 5) numbers declining. Was told pregnancy is not viable.

- 12/9
12/10 - spoke with Dr. and he said there's hope. starting another cycle. Dr. did internal sonogram, everything looks ok.
12/10 started Aygestin pills
12/12 starting Lupron
12/18 - still on Lupron also had hysterosonogram to check cervix...everything seems to be ok.
1/8/08 - started Follistim 300mcg

1/18 - retrieval - 11 follicles
1/21 - embryo transfer 4 follies
2/1
Taking a break until 9/15/08