Is it shameful to spy on my mother’s showering friend?

Marta is one of my mother’s HOTTEST friends. Her deliciously soft body never really left my perverse fantasies and sometimes I’d dedicate entire evenings to masturbating to the thoughts of me fucking her huge ass. As if to prove that thoughts are things and MILFs are thots, Marta came over to our house to take a shower. The thought of my long-time crush standing behind the door totally naked drove me crazy. I took out my cock and started pleasuring myself while spying on her. Her body seemed just so irresistible and tempting, so I decided to burst right in…