We got back late from visiting the in-laws and once again, she didn't get any sleep until I had to basically insist on it. She's sleeping so peacefully in her carseat and I'm thinking about just leaving her in there. Is this a serious "Mommy fail" moment? Will she be fine in there or is this considered abuse?

I have to add that LO is at home, in the bedroom with me, not inside the car.