Written for the Fell Beasts "Trolls" prompt.
They are on the second seed-cake when they hear the ominous tap, tap of an umbrella-tip and a high-pitched, querulous voice.
"Sssh!" Bilbo flattens himself against the parlour wall, frozen to the spot like a troll caught by sunrise. "Lobelia!" he mouths silently to Frodo. "Help!"
"Don't worry, Uncle Bilbo," Frodo whispers, grinning. "I'll get rid of her..."
"I'm sorry, Cousin Lobelia, Uncle Bilbo is not at home. You're most welcome to come in and wait, of course – but I should warn you that the Gaffer and Sam are just about to start manuring the roses..."
Lobelia sniffs, and departs.