Mother's Day is right around the corner so, to celebrate, ET is dedicating this week in honor of moms in the biz. Tonight, the sassiest mother/daughter team in Hollywood, Joan and Melissa Rivers, share their most cherished memories!
Complete with all the big firsts, from dating to sex, the twosome spare no detail on what it's like to grow up Rivers!
Related: Fashionable Mother's Day Gift Ideas for Mom
Click the video to see the feisty pair in action, plus learn the one thing Melissa believes people don't know about her famous mom.
And when you're done, make sure to catch the mother/daughter team on TV with E!'s Fashion Police and WE's Joan & Melissa, as well as on the web in the team's In Bed With Joan series.