How do I fill out Fair Rental Days & Personal Use Days on a Schedule-E if I received rent income but ALSO live in the shared space for all year? Unique situation.

I have a significant other (not married) than prefers to pay me a set amount each month for rent, and I pay for all improvements and repairs, basically like a landlord, if anything comes up.  We live in a single family home in a shared space.  There's no mortgage, and the home is solely mine.  We do split the utility bills etc, and I plan on claiming no deductions.  It's simply a situation where she prefers to pay a certain amount for her and her child to live here, and I guess that makes things easier for her.  This qualifies as rental income as if I rented a room, but it's not a set area of the home, and I have no idea how to file that on a Schedule E.  Would I put 365 days for both FRD and PUD?  I benefit from claiming the rent so I'm not looking for loopholes or alternatives, I simply want to know how to fill out the Schedule E correctly in this situation.