Annoyed

I haven't told my mom that I am bi and to respect her wishes during this hot weather we are having I have left my door open to my room so that the air conditioner can help cool down the house. Just a min ago she had come towards my door while I am on this site reading some of the bi info that is out there on the support page. I turned my head and said yes. She got up set and said that I acted as if I thought she was going to read what was on the computer. I looked at her confused and said ok. All I wanted her to do was tell me what she wanted. She laughed and said not even going to deny it. I looked at her an shrugged and she got even angrier with me. Then with a very up set voice says what she wanted. But seriously she couldn't just have said what she had wanted with out asking questions. Yes I did not want her to read what was on here because I am not ready for her to know. That why most of the time I close my bedroom door when I am on here. But because of the almost 100 degree weather today I didn't because she asked me not to. It's getting annoying that she just wont tell me or ask me what she wants and has to get info out of me and gets upset because I wont give it to her. If I want her to know I will tell her but not till then.