You sound a little like my Sister, ferlew. She'll be glad of her 6-foot plus bodyguards in Cardiff next month. I'm 6' 3". She and her Husband are about 5' 8" and both their sons are 6' 2½".
My Mum and Dad were about 5' 7" and my Brother is 6' 2". I'm the baby of the family!
Me 5'3 (at a push), OH 6'3', 1st son 5'10, 2nd son 6'1 and still growing, 3rd 5'4 and only 12 years old, 4th 4'10 aged 10 - going to put weights on his head to have at least one smaller than me!!
I'm 5'10 .Mr S is 5'9 .He's always been an inch shorter than me .
When we got married forty one years ago we were an inch taller .
We are shrinking fast :)
The offspring are 6'2 and 6'4 and you need a ladder to hold a conversation with them .