An enthusiastic partner, two in-love folks, good suggestions from redEva. But lad, me thinks her desires initiating the play is indicitive that she is not uninitiated to BDSM. Certainly not calling her a liar nor you gullible. My experience has been that such suggestions do not come out of the blue unless one has sampled such delights. I offer this only in that as communication is essential--don't look a gift horse in the mouth but by adding some "interrogation" to red's play (wanting SO bad to participate in this happy twosome aren't you sweetie?) you may find little will scare her.

You're a lucky fellow--enjoy welcome to Jinn's Wunderforum and keep us posted.
Cheers,
Boxer