I know how hard it is that your H has suggested being physical with you. On one hand it's tempting to want to feel close again, on the other it's insulting and making you feel like you are worthless.
My H is not involved in a relationship (that I know about) but I have been sleeping with him. And let me tell you, it's hard. Very hard. In the beginning I thought that I could be intimate with him and still detach, but I am learning that is seemingly impossible. No matter how much I fool myself into thinking that I can do both, I know I can't. With sex comes expectations, and as you can see, we are taught to have none.
On NYE my H came over with D papers. He was serving me. And yet, I still had sex with him. It was passionate, beautiful, and sad all at once. But it also was completely wrong. I have struggled all day today with feeling like scum. Lower than scum.
My advice to you-- ignore his advances. Don't react with anger, but just brush them aside. Yes, it is disrespectful that he is even suggesting something like this while OW is involved. But he is not thinking clearly, is he... You have to be the one who does that.
Use his longing for you to YOUR advantage. He wants you. You know that. Don't give in, but take it for what it is-- you are still attractive and beautiful in his eyes and he is finding it hard to resist you. If your H does not recommit to your M, others will find you attractive and beautiful too.
Hang in there. It's a sh*tty place to bed. It literally can take our breath away. I am in so much pain I honestly don't know how I will make it from one day to the next. But still I do...
Best of luck to you.
Me 26 ; H 26 S 8 Married less than a year Bomb 9/15/14 H moves out 9/15/14 H Files 11/21/14 Served D papers 12/31/14