My MIL is interfering with my family.?

Hi. I used to get along fine with my mil. But ever since I had a baby she keeps on interfering with how I raise my child. I am planning to quit my job to be with my son. My own folks are quite wealthy and my husband has a good job so there's really no worry. Yet still, mil says that I should not stop working. I just think she's afraid that if I'll be a full time mom, she won't be seeing less of my baby. Also, my mil is always telling me that I should let her niece borrow my baby. My mil's niece is a rich woman and has a big house. I think it's improper to ask a mother to let go of her own infant, let alone to separate mom and baby just because mil's wealthy niece thinks my baby is cute. Do I have the right to be mad?