Severus/Narcissa/Lucius
When they arrived at the shoppe, Narcissa felt her heart drop just a little. She had been hoping to make this stop later on in their day, perhaps when the attack would happen. Anything to get Severus inside and away from the Hogs Head. But she smiled all the same, nodding her head. Only Severus would think to buy school supplies on their time out at Hogsmeade.
She followed him into the shoppe, stopping to glance back out at the street. She didn't see anything out of the ordinary and followed him inside, looking around at the various items. It wasn't a very exciting place, but she hoped Severus knew what he wanted and wouldn't stand around looking. She could be out looking at prettier things than the cold cauldrons.
"Which are you going to get?" she asked, stepping up beside him again. In truth she wasn't very interested, but it was something important to Severus, so it should be important to her.