For months I was also confused about the ML issue. SOme say dont some say go ahead. But it is really up to u. U must assess you own sitch. In my case, I went ahead anyway and had great time with H. I didnt cling or needy or anything like that but tried to be sexually attractive and the sex goddess that many men dream of.
Though H continues to see OW, I just continue ML to him. That makes him more confused than ever and I know he is feeling guilty about it. But I was also careful not let him get the impression that Im using sex to get him back, rather it is for me and my own satisfaction. That made him thought real hard about leaving me. He cant seem to handle even the thought of other men ML to me. Again, dont be too flattered about it, u must show to him that u desire him and him alone that you think he is the sexiest man you've ever seen. Yikes, I know its a bit overboard, but it worked in my sitch. Anor LL of his, WA.
So the bottom line is u assess your own sitch and what makes you feel comfortable. If you ever feel cheapened by it, maybe not a good idea.
Just my two cents..
Sometimes the very thing you're looking for is the one thing you can't see..