Have you ever tried to switch things up sexually with your partner and it didnt go as planned?

So less than a year after we had our first son I decided to try to do something out of my norm for my S.O to spice up our sex life bc we had been so busy with work,school, and being parents. We barely had time for us or our sex life and I was still living with my parents. Well anyway I decided to get a quickie in before he went to work so I told him to come over. I came in nothing but my robe and we had a great hot & heavy session in the car. Needless to say I ended up unexpectedly getting pregnant again lmao 😂😂😂