Just found the game - it's great. Love the character graphics. 

How do I unlock the feminine clothes store? Riley wants me to wear a bra but I can't buy one yet. 

Thanks. 

As far as I understand the game, you must attend all classes at least twice to unlock the "Feminine Mystique", which is the store that sells feminine clothing. 

Brilliant. Thanks. That explains why it didn't work the first time through but did the second. 

I've been attending all classes up to that point though and it's still not unlocked.