Sex partner with wife

When i was 9 years old i use to jerk off with my best-friend and it just stayed with me till i got older. We had done other stuff like sex, he gave me head all the time… well im still into men and my wife knows it and long, thick, bent erections turn me on and would love to see her take one… she claims to never had larger then me. im only 6 inches long and around 2.5 inches thick. We found a guy thats bisexual and she willing to fuck him for me to get off… is this normal?