I think LD is usually symptomatic of other things and there really is no such thing as LD or HD unless for medical reasons. People's drives change as their circumstances do.
Don't be afraid of your W's sexuality, if she's using toys and stuff she might enhance things for you once you get back together. A lot of people use sex toys even within a marriage to spice up their love life. Can't say they ever did anything for me but maybe I didn't buy the right ones
I think if this was a problem area, you might eventually have to look at why.
I think you're doing really great, coping with the D, esp. to meet up on the same day, and still managing to co-parent your son. I am envious in some ways. I wish my H wanted my input with my girls.
It's good to say no to her requests sometimes though, so she doesn't walk on you.
Going out of an evening is up to her now. Unfortunately it's her life now. If it's any help, I got to the point where I didn't wonder what H was doing anymore. Still loved him the same but I was not bugged by his 'other' life. The more you get your own, the less it matters.