Religious Roommate Threatening To Evict All Of Us For Having Male Guests

I live in Los Angeles, California in a joint lease with 4 other roommates for 6 months now. We each have our own separate bedrooms. I am the only resident with my own private bathroom. We are all full adults.

At the beginning of our lease (we did not know each other prior to signing), we talked about our roommate expectations to ensure we were all on the same page and that if we weren’t we could relocate per our contract. My roommate expressed she had to problem with us having our partners over. Thus, for the past few months, I’ve been having my partner over every two or three weeks for four nights at a time as we are in a long distance relationship. He is always respectful and never unsupervised.

This week, one of my roommates communicated to us that her mother pays for her rent and utilities. Her mother asked her about our consistently high utilities bill and my roommate explained to her that one of my other roommates and I sometimes have guests (our long term partners) over. This caused her mother to “fly into a fit of rage”as she “signed her daughter up for an all women’s unit not a co-ed unit,” she didn’t want to pay extra utilities for guests, and she (even though she doesn’t live there) feels “unsafe” having male sleepovers. Her mother then notified our landlord of this situation and threatened to formally fine/evict all of us if we don’t work out a solution. Our contract states that overnight guests are allowed for x amt of consecutive days for an x max monthly to prevent tenancy.

I talked to my roommate about this clause and how regardless of how she feels about it, I legally can have my male guest over for the night. She said her mom will be calling the landlord again to see what they can do to prevent or monitor overnight guests. She wouldn’t share what was causing this fear, but I can only assume it’s for religious or puritan reasons as they are fine with female guests.

Our contract states that if anyone violates the lease agreement, we will all be liable. I don’t want to drag my other roommates into this bullshit but I have anxiety about this situation. I’m fearful my roommate’s mother will go to the extent of checking security camera footage to see how long my partner is staying and takes action if he ever contractually overstays. I’m also fearful of being solely evicted/fined even though our lease states we are all responsible for notices and violations. I’m worried about being sued by her or her mother for this situation.

My plan of action is to err on the side of caution and only have my partner over for the days stated in our contract. How likely is it for landlords to step in here and take legal action. Is there anything else I can do to protect myself?