Of course not! She tries to get Donna fully naked.

"Donna, you know what you should do?" Buffy excitedly whispered as a sudden realization dawned on her.

"No, Buffy, please don't say it." Donna knew that if she did, she wouldn't be able to resist.

"C'mon, it would be so much fun!" Buffy took the hem of the shirt in her hands, slightly raising its side up a little, revealing the side of Donna's hips.

Donna simply gulped and closed her eyes, as she began to feel the shirt slowly rising until it finally reached her breasts.

"Donna, raise your arms," Buffy whispered, and Donna, now completely hooked, raised her arms for Buffy, the shirt soon cleared her body, she was sitting in the bus completely naked!

But even then, Donna didn't dare open her eyes at first, but slowly risked finding out how exposed she was, most of the bus didn't seem to notice, but the closer seats certainly did, they whispered amongst themselves and chanced half glances at Donna, soon enough they broke out in full stares as Donna sat there drinking in the exposure.

Sure enough, she felt her loins tingle, being seen naked like this turned her on so much, she raised her hands to hide her breasts and ended up tweaking her stiff and sensitive nipples.

That's when Donna felt Buffy's hand on her breast, slowly caressing her body and traveling from one sensitive spot to the next, not actively increasing her arousal, but just teasing her enough to torment her.