Nina had stopped him from creating a horcrux out of that paltry little mudblood Myrtle Warren. In recompense he'd dragged her along as he searched out his father; this time intent on ensuring his immortality. She'd come along with no fuss and had stolen his maternal grandfather's ring off the mantle of the Gaunt shack for him as he distracted and gained answers from his pathetic maternal uncle, Morfin Gaunt. The conversation had afforded him the identity of his paternal ancestry.