I agree with everyone in that you should just keep it on the DL. I remember when I was in 1st grade, my teacher started dating this guy (he wasn't a teacher) and he'd always visit our class. Every student in the class knew him and liked him cuz he was a nice guy. Then out the blue they got married and like 5 months later, she had a baby. One day, my mom and I were talking about where babies come from and that type thing and I was like, "Mommy, it's not a big deal. It only takes five months to have a baby!"....She was like, "who told you that??!" and I said, "well that's how long it took Miss Ritchie after she got married." My Mom was like whoa
It took me years to catch on to what happened.