"The Real Housewives of New York City" star had wanted to wait a little longer to break the news, but told People magazine, while holding back tears, "It's premature to be telling people this. I haven't even gone through my first trimester. We haven't even heard the heartbeat. My [fiancé's] parents didn't even know."
Over the weekend, People first reported Frankel, 38, and Jason Hoppy, also 38, were engaged. The couple plan to wed before she has the baby.
Frankel says, "Because of my age, it's not like I was going to meet a boy, and then be engaged for a year and then be married for a year before we started trying... I'd be 45."