Yes, she can hold back her orgasm for now

She nods, taking a few deep breaths to try and calm herself down. Your thumb strokes the back of her hand as you wander down the street, wondering where you'll go next. There are plenty of bars and clubs which you could enter so that she could quickly get off in the relative privacy of a bathroom, but you keep walking, letting her frustration build with each one you pass. Of course, she could let go of your hand and go in by herself, but she doesn't. Even as she struggles to contain her arousal, she wants to stay with you more than she fears embarrassment.

"How are you doing?" you ask her.
"My thighs are so wet," she admits, "but I'm fine. I'm under control." There's an obvious uncertainty in her tone.
"Don't worry, you'll get to cum soon," you tell her.
"Really?" she asks eagerly.
"Don't look so relieved," you smirk, "I said you'd get to cum soon, not that it would be in private," you let go of her hand and squeeze her ass, "maybe I'm planning on making you cum in the middle of the street, did you think about that?"

She gasps, her eyes widening. You grin at the panicked yet turned on look on her face, before looking around. Finally, you decide what you want to do.