No, because reasons

"Aaaaand stop!" Sue claimed as she took her hand off your penis. You froze for a moment.
"Wha..? " You asked, confused by her action. "N-no! Please, make me come!" You cried, but it was no use.
"Well, look at the time! I need to buy something for you, so you have to come with me! I couldn't leave my little sister without help, right?" She said with a smile. "Now, now, let's get you dressed up and go.". You stood up, and still with extremely hard penis, walked towards Sue, while she was going through your wardrobe. She was looking relentlessly until she found what she looked for. A skirt and a white blouse.
"Well, for starters, put this on" she ordered while humming, going to the bathroom. "I will get something in a sec, ok?"
"But what about the underwear?" You asked.
"Oh, you won't need it," she claimed, as your jaw dropped. "C'mon! It will be fun! Trust me!" And that was a moment when you knew you can't say no to her. You silently got the skirt on, but there was a problem with a blouse. Your cock hasn't stopped oozing with precum, and you needed to get it into your blouse somehow. You saw your condom pack, on the shelf. You crossed most of the borders, exhibitionism will be just another one in a row. You put a tight, pink condom on your hard-as-rock shaft, moaning a little. It was hardly visible under your blouse, thanks to frills on the button line. It was placed directly between your boobs, turning normal walk into the "jerk-off mobile version".
"You look fabulous!" You heard your new 'sis' as she walked out of the bathroom."But you still lack the final touch." She said as she walked to her purse, (oddly, you didn't notice it until now) and took small, glittering thing and gave it to you. It was a ... vibrator?! You gazed in shock at Sue's face, as she placed her other hand on your shoulder, turned you around and pushed to bend over.
"Don't be scared, it won't hurt" She claimed, with a smile filled with lust.
"But the other will see!" You tried to resist, but there was no use.
"They won't until you bend over." She said as she pushed it deep into your ass, making you squeal and moan in the process. "If you will be a nice little sis, I will keep it on one, but if you will be a naughty girl..." You moaned louder than before when she showed you level three. You were terrified when you saw that this thing has ten levels. Should you keep it down or high though. Low level will make it easier to think, but a ten could make you cum and free you from the **** of the Steel-Dick™...