My elderly couple had 3 kids, who eventually went off to college... in the past day, they have had 3 kids knock at their door, all of whom I adopted. The first occurred when the couple was 52 and 54, the second when they were 53 and 55, and the third (about 10 minutes ago) when they were 56 and 58!!! Has this happened to anyone else?

PS: One of the adoptees looks EXACTLY like the father! Weird...