It would be wise to avoid any controversy (or better still, contact) with such relatives for as long as possible following this dream.
Fang Dream Meaning
Animal fangs in a dream are a warning of serious family troubles brewing, likely, but not necessarily, with inlaws.
[1]Fang Dream Interpretation
1. Feelings of danger or need of defense.
[2]2. A sense that serious difficulties or troubles are in the offing.
3. Use caution to avoid harsh or hurtful words.