The baby approaches 'safe sleeping' like a frat boy approaches safe sex - not at all if there's any hope of the alternative. She will drift off blissfully (no matter how snotty, cantankerous or irascible she has become) when in bed with a parent. This seems quite natural, but cosleeping is a SIDS risk, what with the possibility of rolling over and crushing the bab like a big dumb rabbit.
She particularly likes drifting off in the carseat while wearing her outdoors puffer jacket. Slowly cooking like a foil wrapped beef joint, or perhaps developing irrecoverable spinal deformities from the unnatural jellybean posture the seat squishes her into. Nevertheless it covers the half an hour I need to pack the cans away after we're back from shopping so sod it, job's a good 'un.
If we offered her a plastic bag to shove her head in before bed time I bet she'd take it.