The spoiled she fleetly laid at our door

"the spoiled" - (spoilt) children. 'spoiled' also suggests sin, as in rotten, imperfect. phrase: 'spoiled eggs', also boiled eggs!

"laid" suggests the laying of eggs.

"our door" (to this world) is her vagina.

see: "to hear for their tiny hearties"

The River Fleet, London.