YOU SAID:
I had fun with your mom last night
INTO JAPANESE
昨夜はお母さんと楽しかった
BACK INTO ENGLISH
I had a great time with you last night
INTO JAPANESE
昨夜はあなたと楽しい時間を過ごしました
BACK INTO ENGLISH
I had a great time with you last night
You've done this before, haven't you.