One fun thing about having a pregnant sister is assisting with her expanding (haha...) wardrobe. Any time I'm at a second hand store these days I browse the maternity section to see if I can find any Blueberry-Betsy-ish items.
Although my sisters and I have differing clothing styles, we always keep an eye out for each other as we're shopping for ourselves. Betsy's baby gives us a broadened clothes shopping opportunity.
Of course, as much as possible, I try to stick to Betsy and Josh's standard closet color theme ;).