You're just relaxing in a place, until you see a fluid like entity enter a cup, it's entity c, known for expanding or exploding people if they drink it... Suddenly it notices you, but it doesn't attack you, It just shushes you an enters back into the cup giggling. Then you see Rebecca walking by.

"God I'm thirsty... Got anything to drink?"

She then notices the cup and mistakes it for some water

"Bingo!"

She grabs the cup and is about to hold it up to her mouth and drink it. Do you help Entity C or Rebecca?