YOU SAID:

ur mum so fat that when she went onto the beach everyone thought she was a whale

INTO JAPANESE

お母さんはとても太っていたので、ビーチに行ったとき、みんなが彼女をクジラだと思った

BACK INTO ENGLISH

Mom was so fat that everyone thought she was a whale when we went to the beach

INTO JAPANESE

お母さんはとても太っていたので、私たちがビーチに行ったとき、みんなが彼女をクジラだと思った

BACK INTO ENGLISH

Mom was so fat that everyone thought she was a whale when we went to the beach