would i be unreasonable to ask my roommate let me know beforehand how long her boyfriend will be staying?

my roommate has her boyfriend over a lot (like 5-6times a week a lot). i’ve kinda just overlooked it since i spend at least 2-3nights a week at my boyfriend’s so i at least i get a break. well, my boyfriend has been out of town for work for the past almost 2 weeks and we mutually agreed if we have guests over to give the other person a heads up, but i realized she’ll give me a heads up only when he’s on his way over; so, for example, he could be on his way on a monday and she’ll give me a heads up he’ll be over then, but then he’ll stay here until friday without any other warning than just seeing him in the house.

when my boyfriend stays over, maybe it’s the overthinking, i let her know he’s sleeping over beforehand and ask if she’s cool with however many days he’ll be here (i.e. hey! bf is coming over and will prob be staying over until sunday, pls lmk if that’s ok with you). with her, i guess they have a more lax approach as she has maybe let me know he’s sleeping over twice and so now when she lmk that her bf is coming over, i automatically assume he’ll be sleeping over too.

now, we already have the rule of the heads up and i’m not asking for her to get my permission before he sleeps over, just that i’m given a heads up of how long. also, what might make it harder is i just had to have a conversation about him being here when she’s not, so now, he apparently just goes somewhere else for hours while she’s at work and then comes back when she’s back (since he lives about 1.5hrs away). i don’t wanna keep putting all these rules about guests and seem crazy, but when i’m just in a tanktop and underwear walking to the bathroom in the morning, i’d like to know if i have a chance of running into her bf so i can cover up lol.

so am i being unreasonable? is there a better way to approach this? thank you!

btw: i don’t need specific details like “he will be arriving at 1:34pm on monday the 15th and leaving at 5:32pm on sunday the 21st”. just like a rough estimate like a couple days or something.