Wife is agressive and abusive can i get divorce on these grounds

3.5yrs of marriage with a son 2.5yrs of age.Wife does not behave nice use abusive language against my parents very stubborn n egoistic.Get support from her parents.i askd her for consiling but she denied so my lawyer wrote a notice to her and asked for reply. she got annoyed and left the house with my son and also took all the gold with her n when i asked she said it is in the locker and keys are with her.Now how can i check it i m sure she is just making a story.what if i try to open the locker.Now she is getting ready to file a case against me.will she file a divorce case directly and ask for alumini.My earnings are 40k per month n is living in a rented 2bhk flat.she will definitely ask for alumini according to my earnings how much i wil hav to giv her. i hav my own house in my home town but it is on my grandfathers name can she claim a property share in that house as wel.how i can take my sons custody as well. she abused me even scratched my face never call my parents at all.