Who else is breastfeeding/pumping.. An gets annoyed or emotional when someone else is feeding your baby an wants to…

Who else is breastfeeding/pumping.. An gets annoyed or emotional when someone else is feeding your baby an wants to either throw your milk away or treat is as like its never ending or theres more where that came from , like its not a big deal??... People who do not breastfeed do not understand how much hard work it is to make it that its not easy an its a bond you have with your child weather your feeding from the boob or the bottle from pumping... My sister was feeding my son yesterday an had to nerve to ask if she could just not use one of the bottles that she already warmed up because it looked thinner then some she had feed him before.. An maybe im crazy for freaking out at her but she just dont get it... It ant easy to make its alot of work an its very tiring iv worked very hard to get my supply were it is an for someone to not understand that an just do as they please with stuff like that it just really hurt my feelings... An i guess unless you breastfeed you wouldnt understand this feeling maybe im crazy...