Having experience numerous times helping either the wife, or the husband to step into the hotwife/lifestyle adventureland there are 5 basic steps:

1) Share the fact you have had a thought/ dream of your partner in a sexual encounter that didnt involve you and that it was intensely erotic - a TURN ON to you,

2) When the reaction comes back, admit that you were surprised but emotionally it made you appreciate your partner more and made your partner sexier in how you saw them.

3) That leads to a conversation about trust - the key to success is trust and confidence in your mate- that creates communication and honesty that builds the bond in a relationship.

4) Do some "homework" together - find a few lifestyle sites / podcasts that are real - not porn, porn is fantasy, look at the reality and see if it is something that you could relate to with your partner. when having sex introduce a bit of role play/ conversation - pillow talk is a great place to help each other be playfully honest.

5) Actually meet people - resorts, parties, dinners, drinks etc. with the attitude that this could be fun thing as a couple while talking more, being honest more and actually having sex with another(s).