Mother in law issues

Amber
So, I'm 31 weeks pregnant. The entire pregnancy my SOs mother has not been very supportive or happy about us having a baby. Last weekend we had our baby shower and she came but didn't buy us anything which wouldnt have bothered me if I didn't know she just spent almost $400 on an Xbox one for my SO for Christmas. My SO has a 6 year old daughter who his mom loves and adores. I'm worried that she's going to treat my daughter differently than her other grandchildren. Any advice?