Mommy Can't Stop Herself After Seeing Son's BIG dick

It's not every day a Mom walks in on her Son in her bedroom.. in her bed.. under the covers.. masturbating? I couldn't believe it when I saw it.. it was so perver, him touching himself in my space.. and with a pair of my panties in his hand while he stroked it.. its just not natural.. but.. oh GOD when I saw that cock it FELT SO NATURAL.. my own Son's erection sticking up for his Mommy like that.. so long and so thick.. my mind went to some depraved places thinking about how wide it would stretch my horny tight pussy.. I wan to taste it.. I wan to fuck it.. I wan my sons big dick to creampie me.. is that so wrong of me?.. to want to commit the worst moral act possible with my Son?