YOU SAID:

Your mother was fun to do last night

INTO JAPANESE

あなたのお母さんは昨夜楽しかった

BACK INTO ENGLISH

Your mother had a good time last night.

INTO JAPANESE

あなたのお母さんは昨夜楽しい時間を過ごしました。

BACK INTO ENGLISH

Your mother had a good time last night.