@bellatrixblackx
As much as Narcissa enjoyed the parties her mother throws, the bigger ones quickly grate on her nerves. There seems to be an endless stream of people vying for her attention, and after nearly an hour of dancing, she finds herself exhausted and in desperate need of a break. Thankfully, Bellatrix's general disposition and closeness to the Dark Lord does a wonderful job of scaring off suitors while allowing Narcissa to remain seen as both polite and available.
Finding Bellatrix takes a little more work than she'd like, but eventually, she manages to snag her sister's elbow. "Did you think you'd go through the whole party without so much as a hello for your dear sister?" Narcissa teases, smile broad under the mask. There's exhaustion to her posture and a sort of desperation in how she holds her sister's elbow.
"Tell me, have you been able to enjoy the party? I've been dancing for the past hour, and as thankful as I am for the company, I do feel as if my feet are about to fall off." It's all code, carefully polite language that practically begs for Bellatrix's help.