Request- BDSM m(dom) f(switch) f(sub)

Any of you wonderful creative people… I’d really like to read a story about a dom male and his sub gf who ask a switch female to join them. The switch girl would punish the sub but get dominated by the dom too. It would be great if it could include some spanking, whipping, knifeplay, anal and/or bondage! Thanks in advance!