I would say that sexual intimacy in your current sitch is letting her eat cake. Giving her the benefits of marriage without needing to be committed or faithful to you. I would advise against any sort of sexual activity until legitimate talk of and steps towards reconciliation is on the table.

M: 40 W: 37
T: 20 MR: 13
S13, S9, S4
BD: 1/29/18
Sep: 4/23/18 (I moved out)
8/24/18 I come home, she moves out

If you want to get out of the hole, drop the shovel.