Moving on to a threesome - advice please

Hi all,
After having been fucked by 5 bulls in 7 weeks my hotwife has mentioned the idea of a threesome as a treat. We are both slightly nervous an would like some advice from you guys on the best way to play it?
I will be part of the fun but feel i should take a somewhat passive role, she feels nervous as she has to work on 2 males (which is what she wants - me involved) and not the normal 1.
Can anybody give us a few words of their experience on how best to approach it?
Thanks, Nige

ideally it would be good to choose two who know each other; otherwise choose two that you think will fit best, tell them in advance and go out with them for a take or something, to let them get acquainted. Then watch the atmospere heat up.... and run hom (or to a hotel if that's what u do)
Good luck - and please keep us posted
Panos

so including you it's a 3some, or you would be # 4?