Sleepovers

So me and my bf are both 20 and been dating for a year and a half. Today I asked my mum if I could stay over at his house ( his mum said yes to me staying over), knowing that she would say no to him staying over at my house purely because it’s my parents house and I have younger siblings. She said I needed to ask my dad, he is away for the weekend so I messaged him. After a little bit I went on my mums IPad for something and her messages were open and she told my dad that I asked her and she said for him to say no.

I just feel a little annoyed the fact that she messaged him what to say. What annoys and confuses me more is that she allowed us two to go on a holiday together for a few days. I don’t know what the problem is now.

What should I do?