Chicki! Yes, I think he will lose respect for you.
I'm not sure I could do these things with my H while he is being satisfied by OW. She thinks great sex means he will leave his W. Obviously it doesn't mean that because H is still here.
However I'm becoming more convinced that the bed department is where the main action is for the H. Someone told me years ago when we discussed R and men :Act like the OW.
I thought it was funny at the time, ridiculous. But I'm not laughing now.
I also think the idea of a harem appeals to some men, dipping in and out of women's emotions and bodies. But like you say, chicki, my H is fiercely loyal to OW.