Severus withdraws his hand the moment the weight of the vial is lifted, crossing his arms in front of him. However, his expression isn’t hostile. In fact, he makes an effort to be pleasant. He can tell it makes Arthur uncomfortable having to rely on him – and he knows the feeling all too well.
They’re staring. Summer break had the weasley’s all at home - a home that had so few spare rooms offering privacy that it was impossible for Severus to make a visit unnoticed. It’s not like he’s so keen on spending his summer afternoon in their company either. For Merlin’s sake - did they not have anything else to occupy themselves with?
He clears his throat, purposefully keeping his eyes on Arthur as if they were the only two people in the room.
“The dossage-” eyes dart towards the vial in Arthur’s hands - where he notes a slight tremor, and he pauses.
“Don’t your sons have anything they ought to be attending to?” A kindness - even if it likely doesn’t come across that way. If Art her wanted to discuss the progress of his condition with them, he could do so at his own discretion. Severus, however, couldn’t afford to sugarcoat things.
Clearing his throat, Arthur turns to look towards his son’s, arching an eyebrow at them as he waits for them to leave. He understands why they’re curious, and suspicious, but he can’t deal with them at this moment, not as his hands shake and his body feels like it’ll fall over in any moment.
“Fred? George? None of those ears, understand?” He asks, though it’s rhetorical, as they nod, because they know it - they know he’s understanding and respectful and would normally tell them what they needed to hear but this time... this time, it couldn’t be something they heard. Not until he took it all in himself.
After waiting a few minutes, he finds himself turning back to Severus, letting out a small breath - a sigh, pinching the bridge of his nose. “What about the dossage?” He finds himself asking, a fear coursing through him as to what the potions master could possibly tell him.