I'm TTC & didn't directly tell so

Natalie • Arizona. Want a baby like yesterday. 28 & happily married for 2 years.
He knows I'm off bc and that's about it. He doesn't know that I actively track my ovulation cycle. He has said "we aren't trying, but we aren't preventing" to his mom, so that makes me feel like he knows what sex leads to. I don't want him to feel the pressure of it, but rather that's it's just that "wow my wife really likes the D" lol. Thoughts? Should I tell him?