Lazy mother in law.. still she feels she is the best..pls help

Married for 4 years, with one son of 2.5 year old. we stay abroad and visit my mother in law once every year for 1 month. Sometimes she comes to visit us for 3 months or so.

Now she is with us abroad for 3 months visit visa. The problem is she is very lazy.. gets up at 11 am then dont eat breakfast and just see tv.. (dont even bath).. baths in in the evening. Dont do anything. I am working and leaves early morning then come back in the evening . My son is in the baby sitting till evening which is sad even though his grand mother is at home. MIL cant look after my son due to her laziness.. even i am scared to leave him .. what if something happen to him then she will put her hands up.

I dont want her to do any work or anything at least she can try to stop chanting about her excellent character and how she raised her kids etc which is really irritating if repeated every hour.

She keeps on comparing me with other daughter in laws such as my friends DIL gives them necklace, gets up early and looks after them so well. takes good care of each n everythings etc etc.. list goes on..

She always wants to cry about her daughter.. she is not having good life and how much she is struggling with her life... infact she is married to an engineer who earns well and she is not even working.. full time in house only job she does is taking her daughter for dance class, school & tuitions etc. which is a big job for her and ofcourse cooking - as if iam buying my food from outside always.. I cook after coming from work - no maids but my difficulites all goes in vain.

I start ignoring wht she says and try not to concentrate on her phrases but she comes to my room to talk to me about her friends and her daughter - comparisons..

I am fed up .. its been just 4 days now and i have full 3 months left to spend with her.. give me some suggestions how to deal with her during her stay.

Lazy mother in law.. still she feels she is the best..pls help