YOU SAID:

I can't believe my little sister is this cute

INTO JAPANESE

私は私の妹はこのかわいいなんて信じられない

BACK INTO ENGLISH

I like this cute my sister it's incredible

INTO JAPANESE

私のようにこのかわいい妹それは信じられない

BACK INTO ENGLISH

I like this cute little sister can't believe it

INTO JAPANESE

このかわいい妹のような私はそれを信じることができません。

BACK INTO ENGLISH

This cute little sister I can't believe it.

INTO JAPANESE

このかわいい妹私はそれを信じることができません。

BACK INTO ENGLISH

This cute little sister I can't believe it.