Can you help

Maybe you could help me. sometimes My wife would tell me about some of her fantise,one of them is her being with 2 men to
please her.WEll the other night during us plaing around she brougt this up agian.sence her B_DAY coming up I told her jokingly that I love her so much, that I want her to be fulfilled by more than just my own cock.
She did not object.
Last night, when we were fucking, I pulled out and told her it was now the other guys' turn to fuck I re-entered her with a real looking dildo I purchesed from a adult book store and told her It was another guy.As I was fucking her with the dildo she drop another bomb shell on me
she yelled out that She wants me to eat her pussy while the other man foucks her she begged me and told me that is her real fantise after some heatiton I put the real looking dick from behind her as if the man was under her and her siting on the cock I began to lick her pussy as she rode the fake dick she came and squrited like she never did before It drove her wild after
fucking and eating her with the dildo she milked my cock like never before.
Afterwards, with my cum still dripping out of her pussy,she told me she wanted to see me eather out again.and then said she was joking. I think that she was serious
after we cleaned up we talked about the mechanics and process of how to get a stranger to fuck her.
She is willing but very worried about getting STD or us getting hit on by some weirdo trying to disrupt our life.
This is understandable any ideas