You can ask and should ask . However if he's not up for it then that should be the end of it. You will have to respect his boundaries until you can change them .
Best way to see if he woukd be interested is possibly watching porn and coming across a clio and going from there getting into it and dirty talking during intercourse
The OP is suggesting 2 men with her and the men have sex with each other too. That's what MMF indicates. She might settle for a MFM threesome? That's where the female has sex with both men but they don't have sex with each other. She should bring up the subject outside of the bedroom not in. Let him know her thoughts and feelings about the desire for adding another man to their sex life. Discuss it when he can answer honestly as he might not be attracted to other men. He may suggest adding a female for his pleasure. Instead of a FFM where she is having sex with the woman as well as him, he may be fine with a FMF. That's where she does not have sex with the other woman but both women have sex with him together.
My older brother and I have done MMF and recently FFM with sisters. I never got to fuck my ex and her mother together
Thanks guys! I'm not opposed to having sex with another woman, just not super excited for it either. I think I'll bring up the possibility of a MFM As Barry suggested, perhaps he'll be more comfortable with that to start.
My husband and I have a policy that we can ask for anything. We each have some lines we won't cross but are willing to "negotiate" anything. Its fun really. We play with sexual commodities.
I'm curious with the games being played that you are having sex with brother. Is it only with a female involved or have you had a one on one session before? Maybe you've misinterpreted MMF as meaning MFM. Please clarify.