Don't worry; she's been frantically building up her insulative layer since landing in WI. She'll be fine.
She can totally get by with her outhouse shirt and a cardigan in 27 degree weather. She'll be fine for a little while. Though I truly hope that a photo is taken of Ambo in the wild, hobbling on ice in her blown-out flats and wrapped up in a King-sized quilt.
Edited to Add: looking at the temps that +who cares+ posted for November and December, none of that really looks concerning. As long as the wind isn't too bad, she's not going have problems moving from building --> car --> building. I'd be more concerned that SHOES don't fit her, and that she's too fat to put on socks by herself. Lack of circulation in her laaaayyyygs, combined with improper footwear in the cold would be far more dangerous than her being too fat for a coat in temperatures a little below freezing.