Cardi B Shows Off Her Post-Baby Bod with Offset, and 2 Lamborghinis

Cardi B's latest photo makes it hard to believe she gave birth to her daughter less than 3 weeks ago ... and makes you wonder if her new whip's got enough room for a car seat!

Cardi just showed off her post-baby bod for the first time since she and Offset welcomed their daughter, Kulture, into the world on July 10, and we gotta say ... she's lookin' hot!

It doesn't hurt she and her hubby are also flaunting 2 hot new Lamborghinis. She captioned the pic, "Blessed & Gifted ... Official Lamb Owners."

As we reported ... Cardi dropped a bombshell this week by announcing she's backing out of touring with Bruno Mars this fall to "recover mentally and physically" after becoming a mommy.

The new push present(s) should help.