Emily Ratajkowski pushes son Sebastian’s stroller up a NYC sidewalk

So that’s how she stays in such great shape! Emily Ratajkowski pushes son Sebastian’s stroller up a sidewalk in NYC while clutching a heavy bag

Emily Ratajkowski, 31, and her son Sebastian, two, had a mommy and me day in New York City on Tuesday.

The model — who attended Wednesday night’s Knicks vs. Heat playoff game — looked stunning in a black denim jacket over a black t-shirt with belted jeans and white trainers.

Her long, dark hair was straight and down with blunt bangs. Gold earrings adorned her ears.

The author of My Body wore black rectangular sunglasses as she pushed her toddler’s stroller as she tried to step over a pool of water near the curb. She also held on to a heavy pink bag.

A lush, green park can be seen in the background.

Mommy and me: Emily Ratajkowski, 31, and her son Sebastian, 2, had a mommy and me day in New York City on Tuesday

Puddle: The author of My Body wore black rectangular sunglasses as she pushed her toddler's stroller as she tried to step over a puddle of water at the curb

Puddle: The author of My Body wore black rectangular sunglasses as she pushed her toddler’s stroller as she tried to step over a puddle of water at the curb

The blond toddler wore a red jacket, purple pants and tiny Vans as he peered out at the photographer from his stroller.

On Wednesday, Emily was spotted leaving her apartment in New York City’s West Village.

She wore a very short, sexy, sleeveless black mini dress that accentuated her slim waist.

Emily slipped her feet into a pair of bright white trainers and wore the same sunglasses she wore on her outing with Sebastian.

The Gone Girl actress carried a red handbag over one shoulder and her phone in her hand.

She accessorized earrings and wore her hair loose and straight.

Also on Wednesday, the Lying and Stealing star was spotted during the New York Knicks vs. Miami Heat NBA playoff game at Madison Square Garden.

The model wore a T-shirt with a picture of actress Megan Fox from her 2009 horror comedy Jennifer’s Body.

Casual look: The model looked stunning in a black denim jacket over a black t-shirt with belted jeans and white trainers

Casual look: The model looked stunning in a black denim jacket over a black t-shirt with belted jeans and white trainers

Sexy: On Wednesday, EmRata was spotted leaving her apartment in New York City's West Village

Sexy: On Wednesday, EmRata was spotted leaving her apartment in New York City’s West Village

Mini Dress: She wore a very short, sexy, sleeveless black mini dress that accentuated her slim waist

Mini Dress: She wore a very short, sexy, sleeveless black mini dress that accentuated her slim waist

She sat in court and took in the action with close friend and talk show host Ziwe.

The I Feel Pretty actress has previously been photographed wearing the Jennifer’s Body t-shirt.

Last month, she wore it with gray sweatpants and a brown puffer jacket as she pushed her son’s stroller.

She also posted snaps from a dance she had with Sebastian wearing the same T-shirt.