My Master and I have been in poly relationships where he had other subs (not slaves though). It was terrible. I was jealous all the time, even when I knew there was no logic behind it. Now I am cucked, and that I love and am rarely jealous of the other girls. BUT... they are only casual encounters and NOT bdsm oriented... just nilla fucking around. That is a very important factor for me. I have learned that jealousy in a cucking situation can be very arousing and almost like a purging feeling after I cry about it. It's just so different than a poly relationship or sharing my dom... that just feels awful to me. I know some girls can do it... some like it (or claim to...I'm not a mind reader). But it's not for me.