Wife’s Big Dick Experience

She may have had more but the only one I witnessed was early in our marriage. This is from around 1983 or so. We got carried away one night when a friend of mine was staying with us for the weekend. Long story short everyone ended up naked, me, my wife and Stevie. Stevie has a pretty big cock and I don’t.
This is just an excerpt of the second afternoon or night.
I’m laying on the floor next to my wife as her and Stevie are fucking missionary. We are making out a as he is slow fucking her. I notice her hand on her lower abdomen and I can see she is feeling his dick through her just about the bellybutton, I can see it rise as he pushes in. She takes my hand and presses it to her and I can feel his dick. This is unreal feeling, I started pressing and moving my hand up and down. He reacts telling he how good it feel when I do that and my wife likes it too. He says “if you keep doing that I’m going to cum.” My wife gives me a devilish look and says, “make him cum.”
I was embarrassed then but did stay down there with her and as he started to climax I was over her face kissing and as he came my hand slid down and his dick was between my fingers. I ended up getting a real good feel of him and as he pulled out I squeezed his sensitive head a little and he let out a big shiver. The wife had no idea and as he recovered her hand went to his cock and just slightly touched mine as I pulled away.