Rachel Dratch Reveals Identity Of Baby Eli's Father

Throughout her pregnancy and after the birth of her son Eli Benjamin on August 24, Rachel Dratch remained mum on the identity of the father.

But today, the Saturday Night Live alum is finally breaking her silence. "People are expecting the craziest story," Dratch tells PEOPLE. "I just meant it's crazy for me!"

Dratch reveals that Eli's father is her boyfriend John Wahl, a California-based consultant to natural foods businesses. They first met a year ago at a bar, and six months later – at age 43 – she was shocked to find herself pregnant.

"I had bought into all this stuff about, 'Once you're over 40...' " Dratch says. "I'd gone through the whole process of letting go of [the idea of having kids]."

Dratch says that she and Wahl – who has since moved to New York City to be closer to his girlfriend and 9-week-old son – are raising their son together, and living a domestic life neither of them could have predicted.

"[Rachel] was resigned to the fact that this wasn't going to happen and had written it off," says Wahl, who was "completely floored" to hear that Dratch was expecting. "That may add to the adrenaline and euphoria and excitement."

As for their future together, "the focus now is just surrounding Eli with love," says Wahl. "But you never know!"