dev is a gud businessman and i dont think he gvs same space to everyone like he does to mami...since his mami is his mom's relative so he does not say anything...dev will never do anything that will hurt ishwari and ishwari always treats mami with respect since she feels that mama mami hv gvn them shelter at one time...
it all comes down mother-son relationship...unless ishwari takes a strong stand against mami dev will not say anything...
as for sonakshi...dev is aware that she is not at fault and he knows that mami has really stolen the money...but he cannot openly say that since like i already said he will not say anything against ppl who are related to ishwari...