Threesomes?

[Maidboy]

Have any couples here been dommed as a couple? Or any dommes served by a couple, or group for that matter? As I posted in another thread, my bi-curious gf and I met up with a lesbian domme for some kinky fun & games. On occasion we'd play at being her "butler & maid" with our gender roles reversed, and we both would be disciplined & punished, both for minor infractions and for our having "engaged in unauthorized heterosexual activity." Just wondering if anyone else has had similar "multi-sub" experiences, and how common this is in the BDSM community.