Is it normal that i masturbated with my mom's panties?

Alright so I did something I've never done before. Here lately me and my girlfriend haven't been able to do anything of a sexual nature,for reasons such as we can't always see each other at the appropriate time. So I,as any male in their late teens would be,I have gotten aroused. I have used masturbation maybe once every day our two in order to keep my arousal to a minimum. However,after awhile it got a little routine and boring. I wanted something to make it all more arousing,exciting,pleasing,you know. So today my parents went out and I went into my 49 year old moms closet. I pulled out some of her panties and well.... Masturbated with them. The whole time I was very aroused. I'm not attracted to my mom,I've never thought of her that way. But I found the panties to be very sexy and the fact they'd been used by a woman aroused me. I've heard people do this stuff so I was wondering. Is it normal? Am I just a horny young guy who did this to satisfy himself? Or do I have a problem. Please try and be nice. Don't call me incest and scream. Because I'm not attracted to my mom actually. But if you do think I have a problem please put it in the nicest possible way. Thank you.