So my situation is me and my bf and our kids are living with my parents till the end of the year…

So my situation is me and my bf and our kids are living with my parents till the end of the year when we are getting a house. The question I have is I got a weird attitude from my family when I asked if my brothers friends could use his bathroom in the basement after 9:30 when he knows the kids are in bed. Was that like rude of me to ask? The bathroom is right near our bedrooms and our bedrooms are also the only ones on that side of the house. My brothers room and living space are in the basement any way. I just felt like my dad had this why should we have to offended attitude.