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