Lorna Black Nee Picton Nee Boyd

I am searching for this lady, she is a cousin of my father. Her mother was an older sister of my grandfather. I particularly would like to find her two sons Ralph and Peter or their descendants. I have lots of info about the family, but can find no info about Lorna or her sons after she married for the second time in 1946 to Ian D Black. I was told by another researcher that the two sons attended a school in Dorset, but have contacted that school and they have advised that neither of her sons attended that school, so it appears that some researchers just get things wrong, and I would really like to make contact with some part of this family to add info to our family history