What Do You Reckon?

So my wife and me have chatted, mainly during sex about fantasies etc.
The thought of her with another man turns me on, but never sure if I could actually go through with it?
I know she’s been seeing a physio for a sports injury, but haven’t really thought anymore about it until today!
Wife asks me to confirm info on a text she got from a friend, so I open her phone and something catches my eye!
I can see she’s organised an appointment with her physio but it was the comments after previous appointments that got my c**k stirring.
One about how smooth she is (waxes all over!), and a couple from her about how stiff he is and how wet she was????
Now am I reading too much into this and I’m guessing the wood in my pants tells me it’s doing it for me.
So is she **cling him or is it just the hands on that’s doing it for her?
Should I let on that I know?