My sympathies, having been there myself. It is a rough situation to be landed in. All three of you are nuts.
You are going to feel cramped, like there is an invader in your space, constantly on guard and terribly self concious for the first week or so of silences.
SO WILL SHE!
Those feelings fade pretty rapidly if you let them.
First, communication: Go berate your boyfriend for wasting time on sex instead of teaching you the basics of whatever language his mother speaks.
Then hit the books. You don't have to be grammatically correct, but have enough basic words to check on her comfort, at least, and say please and thank you, and, most importantly Good Morning and Good Night. Make a couple of phonetic lists to keep near you, so you have something to refer to. Panic speeds up your learning ability marvelously!
Second, preparation: Grill your boyfriend. What does she like to do, eat, watch, read? How early does she get up? How active is she? You are hostess here, her comfort is your (and his) responsibility.
If you live in a larger city, try to find a city guide in her native language, so she can get around on her own and not feel so isolated. If you can't find one, tell your BF to make sure she buys one before coming to visit.
Third, expectation: This is the cruncher. Your first visit from the mother-in-law, effectively. It is scary stuff at the best of times. You have the best possible conditions for that all important first visit - if she doesn't like you she can't actually tell you.
Expect to be turfed out of your kitchen for the duration, that seems to be a Mother standard thing. Use that to your advantage. Learn from her. Show you appreciate her, and she'll appreciate you.
And yes, your boyfriend is crazy.
Just be hospitable and kind to her. Like mystery man said, if you show you appreciate her, she'll appreciate you. But maybe look into her culture or talk to your boyfriend to see if there is anything specific that shows respect or disrespect where she's from so you know what to and what not to do. Good luck :)
Find out what her interests are. Hopefully, there may be something that you have in common that won't be so language dependent. Otherwise, my suggestion? Rent a bunch of movies in her native language with subtitles for you both to enjoy.
OMG I am in the same situation except my BF does not live with me. His mother told us she was going to be living out of her car on Mother's Day and I felt so bad that I offered my couch (I live in a 1 bedroom & 3 times a week I have my son with me). Now its been 3 weeks and I don't know what to do!!! My BF lives 1hr away but he stays with me 4 days out of the week because he works near my place and now I am feeling so stressed out... We are not even close to getting married and she is living with me??? There is a reason why its been 10 years since I lived with my mother... don't know what to do!!
Now that is just wrong on so many levels it is ridiculous.
Tell your boyfriend that it is time his couch got permanent dents in it. She is his mother, his responsibility. The 4 days a week he is with you, she gets a bed.
Mystery Man thanks for the replied....yesterday his mother even made herself a spare key to my place. I just don't understand even how his mother is fine with this situation.
Seems like she's fine with it because she's manipulative. Who waits til mother's day to make the homeless announcement?? Is she even paying you??
Tell her you aren't comfortable with her having a key and take it back. Add that it violates your lease. In fact, if you are renting, most places have things in the lease against long term guests. These clauses don't apply to your bf because he leaves every 4 days. Always good to have an answer when she tries to play the sympathy card "sorry I'll be kicked out too if you don't leave."
Have to be polite but firm "you're great but when I rented this place I didn't count on a roommate. I'm afraid I'll only be able to gie you 2 more weeks here, regardless of your situation."