every time she worries, she'd asked him 'what was that verse you told me, about Allah being the best guardian?' and he would recite this to her and she would repeat after him. sometimes she gets it wrong, and he would correct her. again and again.
'your abah taught me this ayat, فالله خير حافظا so no need to worry. inshaAllah everything will be alright.'
i guess that's what soul mates are for, to make you feel safe and secure. to remind you that everything will be just fine. to remind you of God and His Glory.