Breastfeeding doubts??

I plan on exclusively giving my baby breastmilk after birth, and as long as I possible can. It’s my personal goal to build a supply before returning to work, I am very determined and dedicated to do this.

I just found out my mother in law has made my unborn child an email address with which to collect formula coupons and samples with....

I feel slightly offended and irritated by this.... because I have expressed strictly breastfeeding is my goal. Am I being overly dramatic or sensative? What would you think?