How Would You Feel❓

I been with my bf for a year and 6 months. Before I got pregnant we used to have sex multiple times a day and everyday. I gave birth to our daughter this past Nov. One morning we had sex, he went upstairs to nap before getting ready to work, I went upstairs to see if he was up for work, the door was cracked and I peep in and he was beating his meat to porn or something. I walk in and he didn't stop, so I left out the room to let him finish. I'm not mad that he was doing that but I feel some type of way because we had just had sex no more than an hr before that. How would you feel if you walked in on your SO/Hubby/or whoever doing that after you two have had sex?