I didn't think it was horrible...I thought it was hilarious.
It reminded me of my mom....I remember when I was 16 my mom told me that she wanted me to have safe sex and she would buy me condoms if I wanted her to but she didn't know what size I was. She was like I know how big your father is....I was like mom shut the **** up...never speak of this again.
My mom has always been honest and open...sometimes to honest and open....she is like the dad from American Pie...its perfectly natural.