<human>: Can you succinctly summarize the text in 1-3 sentences?

Yo, sup r/relationships, just looking for some advice, I am 20 and studying online from home with a younger sister in her last year of high school (generally not around when uncle visits) and a mother who is studying teaching and volunteering at the local high school helping younger students (yr 8/9).

My uncle recently stopped working and has started receiving disability benefits and has moved in with friends of his nearby, so he has started coming over to visit us more often. He generally just sits on his phone complaining about everything (from young kids being rude to leg pains to politics), and goes through our cupboards taking painkillers (oh, you just bought a new box, I'll just take a strip), food and cigarettes without even asking.

It's got to the point where mum has started putting her smokes in the study, because he would take half a pack when she left him alone for a few minutes.

Last night is the main reason I am posting this, because I don't know exactly what to do. He came up last night while I was out, and when I got home mum was nearly in tears and really angry at him, because from what she told me, he came in and when straight to where we keep the medicine, grabbed a strip of pain killers, made a coffee, turned to his phone and left after about 15 minutes.

I did my best to be there and to calm her down enough to go to bed, but I just don't know exactly how I should deal with this. Would it be an over reaction if we asked him not to come around anymore? Or is it expected of family to be OK with another family member coming into your home and just taking whatever they want?
<bot>: Uncle comes over, takes smokes/painkillers, is it an over reaction to ask him to not come over anymore?