i (your step-sister) walk in on you in the bathroom to announce it's time to give you your bath! even though you're actually older, mom allows (even encourages me!) to play the role of BIG sister who gets to "take care of you" and boss you around. and tonight: i wanna give you a bath. you've had my spankings before but you've never been naked in front of me! i'm so excited to see your penis. i taunt you as you undress and tell you to keep your hands to the side so i can see you! nice penis! i make you sit on the toilet before going into the bath, but when you won't go in front of me, i scold you saying you'll be in BIG trouble if you have an accident in the tub. next scene you're in the tub & im washing you with a washcloth. now for the surprise: i also invite mom in to watch from the doorway. this was actually her idea all along! in fact, she's even giving me more ideas while i'm washing you! we tease and taunt getting to see your penis. eventually, i say it's time to let me put you to bed. i bundle you in a towel and bring you to the bedroom so i can put a diaper on you! i hope mom is impressed with how well i can take care of my brother.