"Oh, little brother. Do you think I’m stupid? I know you’ve been slipping me pills for the past couple weeks - in my coffee, my water bottle… What else could explain my tits growing this huge?! You’re in a lot of trouble now, little brother. Oh… I won’t tell anyone… That is, under one condition….
You are a slave to my tits from now on. You’re going to massage them when they are sore, you’re going to suckle my swollen nipples, and you’re going to keep giving me those pills until my tits are absolutely massive!”