I would need to double check, but I'm sure you can PVR even if you are DWR'd. You just can't use the PVR as means to get out of an OOA; but for you the OOA is a seperate issue to your PVR as you are not PVR'ing to get out of an OOA. Double check with you Chf Clk on that one. I've signed off on PVRs before for people who were going OOA and they were fully aware that would still be required to honour their OOA.
This is the problem, I think the OP doesn't want to do the OOA because of the situation with his wife, by PVR'ing alone he can't stop the OOA, it just pushes the out date back. So the OP has gone down the compassionate route to support his wife. Hence why I suggested that there may be other avenues such as preferential treatment, he may then not need to leave the RAF. Of course he may be a chancer but we can only go on what we are told on here.
Bigtexo, think long and hard about this, I presume you are an SAC? You've done 10 years, 2 to do till 12? You leave now you loose you lump sum (is it around £10000?), of course you may have no option but to leave now, but the RAF may be prepared to allow you to continue with a marker stopping you going OOA for a period of time (this will be determined when as part of the application for PT).
I think what Noidea is trying to say is speak to you Flt Cmdr/Chf Clk/SMO/Padre etc, cards on the table, tell them with maturity and respect what your issues are and what you would you feel would help you, and ask them what, if anything, can be done. Sliding scale:
1. Stay in with their support.
2. Leave via PVR avoiding the OOA.
3. Leave via other route avoiding OOA.
4. Medical (your mental health/stress etc) avoid OOA.
5. Do the OOA and then consider your options.
Assuming you have laid the facts bare on here, I see no reason why you shouldn't be able to get preferential treatment to avoid the OOA, at least for 1 year to 18 months. By which time you will be (I presume?) in the last 6 months of your 12 and you can leave, you will not pick up an OOA in the last 6 months. I'm a techie not an adminer so I may be wrong with this advice but from my 20 odd years of experience I would say you have a very good chance, if this is what you want of course.