"Yes," Narcissa answered.  "There was an altercation a week later at a birthday celebration for his brother William Weasley.  He breached the protective wards at my home and tried to sneak onto the property.  We do not know what he had planned for Hermi... I mean, Mrs. Snape-Yaxley that night.  He has scarcely given her a moment’s peace since she became involved with us, and nearly every conversation she has with him results in an altercation of some sort.  He has refused consistently to accept that she has moved on from him and does not wish to return to how things were between them prior to March of this year."