Reluctant Bratty Step-Sis Gives Tittyfuck

Story - It's a hot summer day and Aria's about to hop in the pool and listen to some music but she can't find her portable speaker anywhere so she heads over to her stepbros (your) room to ask if you've seen it. Turns out you actually have it but say you won't give it back unless she shakes her tits in front of you. She's a little confused at first and assume you're just joking around until you mention seeing her sneak out of the house the night before. At first she tries to lie and say she doesn't know what you're on about - but then you show her the evidence... a photo you snapped of her sneaking out from your window. She can't believe you took that and tells you to delete it. You say you'll tell stepmom and stepdad. She  begins pleading with you not to say anything. You say you won't as long as she does you this one favor. She's hesitant and annoyed at first but eventually agrees to do it. Since Aria was about to hop in the pool the only thing she has on is an oversized t shirt with her bikini underneath. You're first instruction is for aria to keep her shirt on as a tease for whats to come and just do some normal tit play like bouncing her tits around and smacking and squeezing them. Then you tell her you want her to get closer and do the exact same things right in front of you're face. Then you tell her you want her to take her shirt off and do those same exact things again but now in her bikini. you ask for one more favor. You want her to tittyfuck you.