Oh, don't worry, Felix. My younger sister was your mother.
5 seconds sound clip from the Mad Monster Party? movie soundboard.
You can hear this line at 01:02:15.532 in the Blu-ray version of the movie.
Quote context
[...]
- Well, you see, Uncle, I'm a pharmacist.
- Ah, then you must have conducted experiments of your own.
- Oh, yes.
- Well, after I retire, you'll have all the time to experiment that you want.
- I'm turning over to you my secrets and discoveries. The entire business!
- Oh, but Uncle, I already have a job, and I don't know anything about your business.
- Oh, don't worry, Felix. My younger sister was your mother.
- Frankenstein blood flows through your veins. You'll do just fine.
- Well, I don't know, Uncle. Just what is your business?
- I am the head of the Worldwide Organization of Monsters.
- Uncle, I may have the blood for the job, but I sure don't have the stomach for it.
- I know, my boy, but consider this.
[...]