Tiffanie DiDonato tells PEOPLE Now that even harder than keeping up with her able-bodied children is admitting when she needs help

By Rennie Dyball
September 28, 2015 01:45 PM

Tiffanie DiDonato has a 3-year-old son who is quickly gaining on her in size and physical ability. And she’s got a newborn baby. Due to her rare form of dwarfism, diastrophic dysplasia, she has arthritis and joint pain that limit her mobility.

But even harder than keeping up as a new mom of two (and still recovering from a c-section, no less)? Admitting when she needs help.

“It’s kind of an ego thing. You don’t want to admit it to yourself and you feel like a failure,” DiDonato (who wrote a memoir with PEOPLE’s Rennie Dyball) tells PEOPLE Now. “Many moms need help, it’s just admitting it. And that’s probably a bigger struggle than having two kids!”

With sons Titan, 3, and Tristan, 3 weeks, DiDonato says she’s learning to “cherish” the help she gets when husband Eric, a Marine staff sergeant, is at work for long hours.

Asked how she’d respond to the naysayers as a parent with a disability, DiDonato said, “Moms come in every shape and size. There is not stereotypical mom and there shouldn’t be.”

“Just because a mom looks different or has different challenges than another doesn’t mean they don’t deserve to have children or the family of their dreams. A good mom does it on her own but a great mom knows her limits.