My Wifes Fetish

Told my wife recently I'd had gay sex when I was a teenager. She asked me excitedly if I'd been fucked and when I said "Yes, several times", she all but orgasmed.
We had sex and during it, fucking my wife missionary, she reached to my arsehole and inserted a couple of wet fingers.
It made me cum so strongly and in turn made my wife orgasm.

A week ago she tongued my arsehole while stroking my cock. And while she did she asked me if I wished it was a guys cock entering me.
I lied and said that part of my life was finished (Wishing it was a guy tonguing my arsehole getting it ready to be fucked) And my wifes reaction was one of disappointment.
We had sex with her eventually riding my dick anally. When she came just before I spunked up her arsehole, she cried out "Yeh, you need this".

During our evening meal last night, my wife told me it turned her on thinking of me being fucked and if I wanted to, she'd love to be involved sexually with me and another guy. A guy that would fuck me too.
She said it in a jokey way, but now I'm thinking she's serious about wanting us to share a guy. And to watch me being fucked.

I've never known a female to want this, so is my wife testing me or does she really have a fetish about watching gay sex up close.