younger brother took care of my wife while i was in jail

I was in with the wrong crowd when younger and got busted stealing radios.
I went to juvie and while there my younger brother filled in for me with my girlfriend at the time. We were going together for 3 years already and talked about getting married. I was 17 and he was 15. She was 16. I didn't know anything about it until my wife and I started having 3somes. She cried when she told me and then I asked her to give me details. I was so turned on. He was in the navy and due to come home. She asked if we could have him over for another get together, I said hell yes. We got together at the airport and Jen got in back with him and made out all the way home. He is actually a bit bigger than me and she loves it cause she said he reaches in deeper.
I admit it is a bit degrading, but i have always lved my bro and now I love to eat her out after he cums in her.