I did the maths at the weekend, and if you count the stepfamilies, both of which also feature stepfamilies of their own (and since they both know each other, and my lot, and everyone gets on fine, why wouldn’t you?), Aidan has 12 living grandparents - the regular 4 biological ones, and 8 step and step-step ones. He also has 20+ aunts and uncles (I can’t remember how many siblings his stepdad has).
If he ever has to do a “draw my family” exercise at school they’re going to need to give him a very big piece of paper to do it on.