My wife (30) is very fit and had A-cup breasts before giving birth, but her tits have expanded to very perky 32C’s since the arrival of our little one. Soon after giving birth, my wife and I had her 60 year-old father, who hadn’t been very involved in her life since he and her mom divorced before she could remember, over to our place. As we were all navigating the territory of what’s ok around whom and being too sleep deprived to put up the usual defences, I caught my FIL staring at his estranged daughter’s immaculate milky breasts. My wife noticed too and immediately covered up, but thinking back, it would have been hot to see things develop