Age differences?

One of our black gentleman friends is in his mid 40s and has set up some BBC gang bangs for my wife, most of the time with guys around his age. A few months ago he asked if she had age limits that he had something special he wanted to set up. She told him no one old enough to be her grandpa & the youngest had to be of legal age. The very next Saturday evening our friend, his 64 year old father, and his 2 sons 19 & 21 used my wife like their family slut all evening long. We all had a great time!