Hi Phil,
I'm so very sorry to hear of your loss. I can only offer my condolences and pray for Penny. It's at least some comfort to you and your wife that you were together when she passed. Keep your chin up, and never forget her.
A good friend of mine lost his wife 6 months ago, she suffered from severe paranoid schizophrenia for over 12 years, but finally gave in and took her own life in September last year. The hard times that follwed trying to find her body were fraught. That just added to the upset.
Awful times, lets hope you can deal with her peacfull passing.
Much love.
Neil