Disabled wife's rights

Hi,

We have been trying to get our marriage back on to the straight and narrow for just under five years now.
My wife of nearly 12 years (we're both 35) has been diabetic for 25 years - since she was 9
We met in 1990 (18) and got married in 1996
Diabetic complications prevent her from working..she gets better though..
2001 She becomes a dental nurse
2002 March. She(we) had a daughter - she stops work
2002 April. She has a stroke - right side dexterity 80% lost
2005 Feb. Kidney failure
2005 April. She has an online affair and spends one night with him. I find out, she says it'll end... she stays in touch. (it was I accept escapism from the very real thoughts of dying...she could pretend to be healthy and single online)
2006 August. Dual Kidney/Pancreas transplant with the promise of a new woman.... who didn't materialise...
2007 November. Find out she's been lying about her benefits
2007 December. Heart attack

Since becoming a mother she has always been on benefits. As a direct result of her significant illness (I believe) it has all contributed to an 'angry' woman who can't help but lash out at her nearest and dearest....me.
I've been there throughout, yet recently, probably accurately she suggests thats all I was...there... not really loving her...
So we enter (angrily) divorce discussions.

She suggests that as a result of her 'dependency' on me, that a divorce will see paying for her next mortgage, or buying her a flat on top of childcare etc.. is that right?
Despite our lives destined to be apart, I will have to support my new home and hers?

any advice/opinion welcome.

Thanks

We're still trying...we're going out for a meal tonight, but the emotion and negativity of the situation has a sense of inevitability about it I fear....