neither one of them had a good response

former roommate: My mom has a computer science degree. But she only worked for a year as a software developer and then she got pregnant with me.

me: How foolish of her to get knocked up.

...

my mom: We've never really had a vacation. Of course, we didn't always have the money, what with all you kids.

me: How foolish of you to get knocked up so many times.