Complex sentence: Days later, she realizes that Hanna is really gone and in her grief over her great love, she tells Ansgar (Wolfram Grandezka) about her love for Hanna, not knowing that he will hold that against his sister.
Split into simpler sentences: Days later, she realizes that Hanna is really gone and in her grief over her great love, she tells Ansgar (Wolfram Grandezka) about her love for Hanna. Not knowing that he will hold that against his sister.