They got so lucky in the in-law department!

Nicole Richie and sister-in-law Cameron Diaz did some holiday shopping in Beverly Hills yesterday, and we guess they're not the type of chicks that have all their presents wrapped and under the tree weeks before Christmas.

The retired actress is happily married to Benji Madden, while the fashion designer has been hitched to his brother Joel for over a decade. When are Cam and Benji going to give Harlow and Sparrow some cousins? At 46-years-old, the blonde beauty has a very small window of time left to expand her family.

A source tells X17:
    "Cameron and Benji were trying for a baby the natural way for so long, but nothing was happening. She's hesitant to try IVF because she sort of feels that what's meant to happen will happen, but they're thinking adoption is their best option at this point. They want to give a lucky child a great home, and they feel there's way less pressure and a time crunch so they can actually enjoy the process."

We want to be part of their girl gang!