H and I have experienced several traumatic events/health issues during our R. None of them were sex-related but I'm sure they exacerbated our SL problems.
We had been married for 3 months when H was diagnosed with his heart defect. When we married we expected that he would be a Navy pilot. The diagnosis meant the loss of H's dream of being a pilot, the loss of a military career of any kind (he was deemed unfit for military service), and the uncertainty of a rare and scary medical condition. I think it represented a loss for me too, in that it was something we had been building toward--something that I had begun planning my life around too--and it was gone in an instant, with no warning.
4 months after the diagnosis and loss of career he lost his job.
This may be irrelevant to the topic, but later in our R we dealt with my diagnosis of psoriatic arthritis (similar to rheumatoid) and the progression of the disease, my depression, and several years of infertility. These had huge effects on our SL.
