Thanks for the comments.
So, after he came inside her for the 2nd time, we just took it easy for a bit, had a couple takes and chatted. As it turns out, the guy wasn't much of a conversationalist, so keeping the conversation to a minimum was essential. My wife described him as nice to look at, great in bed, great cock but a bit of a douche bag when he wasn't fucking her.
So after a bit of poor conversation, my wife took the initiative and started making out again, playing with is cock, while he started caressing and groping her. As soon as he was hard, she positioned herself with her leg over his to allow his cock access to her pussy, before slowly guiding his cock into her pussy. It was very hot to watch her take this initiative. They fucked like that for several minutes as they passionately kissed and caressed each other. She had another orgasm before climbing on top of him and slowly riding him for a very slow, long and sensuous fuck. It was so passionate that I did begin to feel a bit jealous.
Here are another few pics of that sequence. I will try to finish off the rest of that night as well as update soon.