Momo walked in on me...?

So today I was masturbating and I was laying on the bed I thought that I had locked the door, but I didn't and my mom walked in asked what I was doing and I told her that my penis hurt, but I was to embarrassed to ask what to do and she told me that she didn't care and went to go and tell my dad. What should I do should I just ignore it or what? Has this happened to anyone else what did you do?