Loob's being ladylike and Crimson-Sky is being shy.
What's brown and comes steaming out of Cowes?
The Isle of Wight ferry.
In many situations the "steaming pile" alluded to is a steaming pile of bullshit, horseshit or just shit. The shit being alluded to is, in turn, metaphorical. It generally means trouble, difficulty, problems, unpleasant situations, ... ...