I was acting as a nude model for my mom, but then... I caught a glimpse of her panties, got a boner, and well...

I was acting as a nude model for my mom, but then... I caught a glimpse of her panties, got a boner, and well... cover

[polbockle] 母さんのヌードモデルをしていたら、母さんのパンチラ見て勃起してしまい、そして…。