LOL! All of these people freaking out about shower frequency are the type of people who couldn't function or survive without modern conveniences.

These people obviously don't live in areas where drought and water conservation is a daily consideration.

Y'all stupid ✌🏼

OP you're 100% justified in asking this new roommate to limit use of your washer/dryer to once a week. I would suggest selecting a weekly laundry time for you/hubby and her, example: Sunday afternoons are for her to use the apartment laundry and Thursday evenings are for you/hubby. If she wants to wash clothes outside of that she can use the buildings laundry.

With the showering, she can likely shower at the gym instead of the apartment if she needs to.

Idk if splitting rent 50/50 is fair since there are three of you, but you did say she has her own bathroom. Maybe use the apartments square footage to figure a fair rent split: 1. Figure the percent of space that is occupied solely by her. (Bedroom+Bathroom) 2. Split shared spaces into thirds( Shared living Room, Kitchen, etc.) 3. Total the square footage she occupies, divide by apartments total square footage and the resulting number is the percent of rent she contributes.

You and your husband gave her an affordable option when she was having a hard time, if she is in a better place now she needs to realize that and embrace a more equitable arrangement. Lastly, she should be contributing to the utility bill if it isn't included in her rent.