In Need of Help!! Dont ignore please

So i downloaded this app on a phone that u can see the baby on a different phone (i use to live in a house that was only downstairs now we stay upstairs hes 10months old) not in the mood of getting a real monitor so dont say go get one cus i just use it once in a whilee... anyways u need a password to access it my husband gave it to my mother in law they keep checkin on me on there on what im doing im pissed off there invading my privacy am i wrong to be mad.. im thinkin about deleting it cus sometimes im changing or breastfeeding my baby and she will turn it on... i did talk to her and she goes i jus wanna see what the baby is doing.. when i messaged her earlier saying ill call u when im free im mad and feel like i need to be cautious all the time now on what i do..

( its just not his mother its his whole family)