Uh, you kind of got an answer here. Your W was prescribed Cymbalta for depression. One of the most common side effect of anti depressants is low libido.
That being said, it sounds like she is taking her depression seriously. This little birdie would recommend you treading lightly and asking appropriately what she feels is causing her depression.
And I know you don't want to hear this, but I'm gonna come out waving my hands above my head so you know I'm serious about this elephant in the room. Your W is my age, along with Goat Gal, 25 and Bug. We're all telling you we feel differently about the 50 thing. I'd like you to accept this as a truth for your W too.
I'm not saying that you don't have just cause to get to the root of things. She owes you that much. But marriage is about compromise. And what's not shared here is how that is done behind the scenes. I said it before and I'll say it again: the devil is in *those* details.
I truly wish you well navigating these waters. I would hope that she would open up to you. But Bug may have some sort of insight here that you might want to explore more too. Something isn't well with her...
And just so you know how committed I am to moving through this stage of life better, I put myself back in IC as well. I'm not even entirely sure what the cause is, but I'm willing to go a little deeper and find out. I'm just glad I'm not married or in a R right now so I can get moving on the solution.
Good luck- Betsey
"There are only 2 ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle."