I mean, you can write absolutely anything you want, the issue is whether it means what you want. {juHDaq} would be part of the clause {qaStaHvIS ram}: "While night was occuring in the house, we and the cat studied." If I saw a sentence phrased like that, I would wonder why it was necessary to specify that night is taking place in the house. Night takes place over a wide area and is generally not considered an indoors thing. Is there some kind of temporal anomaly in the house, and it's daytime outside?