Explore my wife's Bisexual Curiousity (Ladies Only)

We are a happily married couple that has been married for some years and have and awesome sex life.
Straight male and bisexual female.
We have discussed this and decided that the Mrs must experience her first bisexual encounter. Live out her bi-curiosity.
We have set our boundaries and they are as follow:
1. We are only looking for ladies. (No couples and definitely no men. My man satisfies my every need)
2. My husband will always be present but will not take part only watch (Ensuring my wife's safety)
3. This will only be casual and no serious relationships will be entertained. (Our marriage is too important)
Gentlemen please don't imbarres yourself and look like an IDIOT!
LADIES ONLY!!!