Once he understands the severity of the situation from your perspective, he might be more amenable to having a conversation with his mother, even if he doesn't fully agree.
Naho zwi tshi vhonala u nga muswa waṋu ha tendelani na zwine na khou amba, khamusi a nga tendelana na zwiṅwe zwe na haseledza nga hazwo u fhira nga nḓila ye na lavhelela ngayo - naho a nga si tende.