Mother-in-law

is it just me? My MIL is suppose to be helping me with my twins and household chores. She helps cook dinner a couple of times a week, watches the kids sometimes, and helps feeds them with me late afternnons to evenings .She lives with me and said she would help with other chores. i am looking for assistance not for her to take over the chores but i find myself doin 80% of the work load. i feel like what is the point of having her here. i am overwhelmed when i shoukdnt be. she claimed she would assist with chores before moving in and doesnt do hardly any chores. am i being unreasonable? she lives rent free and saves up all her money.