Experiencing problems with the in-laws

I am a younge muslim widow. My husband died 6 month before with cancer. I have 7 years twins boys, we live in Newyork city by ourself. My in-law's family members hurts me with backbitting, false accusations and that makes me feel low, inferior and backward and it is a part of our bangladeshi culture and they almost don't support me with almost anything but my husband did huge contributions for them and made them rich but I have nothing here except my boys, so I have to work hard for raising our boys. I am not thinking about another man. I just want to be a good muslim mom and good widow, so can you advise me. Is it ok in Islam to avoid them or talk minimum or stay away from them as a good muslim woman? Please advise me I just want to live with my boys with respect and dignity.