Hm

It's giving "Caressing the nipples of my sleeping bear" vibes. (For those who don't know, title of another manga)
I genuinely think this is direct inspiration from that because there's the "I raised you as a small child then you went away and grew up the rest of the way so it's not weird I promise, but I still feel guilty as a character which is telling" trope and then there's the bear with big tits.