YOU SAID:
if we just stay together on night what would happen?
INTO JAPANESE
ただ夜一緒にいたらどうなるの?
BACK INTO ENGLISH
What if we just spend the night together?
INTO JAPANESE
一晩一緒に過ごしたらどうですか?
BACK INTO ENGLISH
How about spending the night together?
INTO JAPANESE
一緒に一夜を過ごしてみませんか?
BACK INTO ENGLISH
Would you like to spend the night together?
INTO JAPANESE
一緒に一夜を過ごしませんか?
BACK INTO ENGLISH
Would you like to spend the night together?
That didn't even make that much sense in English.