The aftermath for me didn't really change much. I still lived with my parents ofcourse and I even told my mother a while later about it. Her main concern was whether I had a bigger love for balloons than for girls (I'm male).
I made sure that was not the case and that she would eventually be a grandmother so she had not to worry.
Fast forward to now, I live together with my wife and have a son of almost 4 years old. We do use balloons occasionally. The only real problem is that my wife is kind of phobic for a balloon to burst. As I am a non-popper that is kind of useful to me. We do try to blend balloons in our sexy time once in a while. We talk about it a lot, and I tried multiple times to explain how the fetish works, what we could do with them and what shapes are useful.
As for now, we keep with the Qualatex 18 inch. Bigger is scary for her and puts her off. As for my mom... I don't know if she even remember that conversation. She might do, but I like to think she doesn't