There was a reason why Pansy had been the girl Slytherins had flocked around. She had many fine qualities that attracted others to her, manipulation and confidence aside. Parkinson was an excellent partner in cooking up schemes and keeping everyone, including herself, entertained.
So, when opportunity presented itself to a bored rich girl such as herself, she had no qualms on pouncing.
"Why hello there, Pucey! Fancy seeing you here. It's been awhile, hm?"