My wife says no sex while her mother stays with us

I’m happily married with two young kids ages 2 and 4. We stay in a 2-bedroom apartment and usually leave the connecting door ajar so that if the kids wake up during the night they may have access to our room to seek comfort, which is very frequent especially during these noisy thunder storms.

My problem started with the arrival of my mother-in-law, less than a week ago to spend 2 months. Of course, she sleeps with her grand kids in their room. This doesn’t stop them from frequenting our room during the night, so the door is still left ajar. Much to my amazement, my wife has now told me that she will no longer allow us to copulate during the time her mother is with us. She said her mum scolded her and feels we are rude to engage in lovemaking knowing fully well that she is in the adjoining room.

My wife has always feared her mum so it is impossible for me to convince her that this is her house, not her mum’s. I don’t see myself going one week without sex, talk less of 2 months! Is it my fault that the bed creaks or that my wife has to make noise at her height of ecstasy?

I feel that my mother-in-law is being very intrusive and insensitive and I’m prepared to talk to her and ask her to leave if she insists on tormenting my wife, but I know that my wife won’t find it funny at all. What should I do?