YOU SAID:
My mother's sister is my favorite aunt, but my non existent sister is her favorite niece. My brother's friend loves to eat soup on the weekend.
INTO JAPANESE
私の母の妹が僕の好きなおばさんが、存在しない妹が好きな姪。私の兄の友人は週末にスープを食べるが大好き。
BACK INTO ENGLISH
My favorite aunt does not exist is the sister of my mother's sister's favorite niece. I love my brother's friend eats a soup on the weekend.
INTO JAPANESE
私の好きな叔母が存在しない私の母の妹のお気に入りの姪の妹です。週末に私の兄の友人の食べるスープを大好きです。
BACK INTO ENGLISH
I do not have my favorite aunt mother's sister's favorite niece's sisters are. Love the soup on the weekend of my brother's friend.
INTO JAPANESE
私は私のお気に入りを持っていない叔母母の姉の好きな姪の姉妹します。私の兄の友人の週末にスープが大好きです。
BACK INTO ENGLISH
I do not have my favorite aunt mother's sister's favorite niece and sisters. Over the weekend my brother's friend's love soup.
INTO JAPANESE
私の好きな叔母は母の妹の好きな姪と姉妹とはありません。週末に私の兄の友人の愛のスープです。
BACK INTO ENGLISH
My favorite aunt mother's sister's favorite niece and sister. This weekend is a friend of my brother's love soup.
INTO JAPANESE
私の好きな叔母は母の妹のお気に入りの姪と妹。この週末は、私の兄の愛のスープの友人です。
BACK INTO ENGLISH
My favorite aunt's mother's sister's favorite niece and sister. This weekend is a friend of my brother's love soup.
INTO JAPANESE
私の好きな叔母の母の姉の好きな姪と妹。この週末は、私の兄の愛のスープの友人です。
it is unlikely that this phrase will ever reach equilibrium