Sleep Deprived - the new baby smell

Hi Shan - I'm not sure I'd call this 'sweet', but then I haven't experienced the pleasures of this particular scenario, so I'm prepared to take Colleen's word for that. It is intriguing, this 'darknight' perspective on the 'new baby' stimulus, though I recognise and empathize with the sleep deprivation syndrome generally :>

A triolet - the rep and rhyming patterns are perfectly executed too. You've dumped the conventional iambic tetrameter rhythm, which is ok, cos although it doesn't roll off the tongue in places, that kind of reflects the disorientation inferred by the title & body of the poem.
The closest I could get to rendering it in conventional meter, with the minimum modification (and time) was this:

In darkest shadows of our room
the eerie silence heightens, yet
no monsters lurk, no dangers loom
in darkest shadows of our room.
No sign of erstwhile passion's bloom
though, hand in hand, the bond is set
in darkest shadows of our room;
the eerie silence heightens yet.

A bit cumbersome I admit, and the 'yet' rep requires the meaning to stretch from 'but' to 'still/even more', which is somewhat archaic perhaps. And you probably don't want to take that route anyway.

So, final word - atmosphere. This reeks of it, monstrously effective :>