He made a mistake of not cherishing his wife when she was still here it was only after she was gone he realised he couldn't lived without her. Eventhough he has mistreated her previously before he was reborn therefore he wish to treat her better by being an attentive, loving, caring husband as he should. Whatever his why wanted, he would do his best to fulfill it, even if it would hurt him in the end. He knew that he deserves whatever ever hate that his wife would give him bit he would accept it