Hang on, Heidi! Klum grins like a teenager as she jumps on boyfriend Martin Kristen's motorcycle after a day out with the kids

She enjoyed a lazy Sunday morning with her two children and boyfriend Martin Kristen.
But later in the afternoon the pair stole some alone time as the continued St. Patrick's Day festivities.
Heidi was seen clutching her bodyguard boytoy around the waist as they weaved through streets in Los Angeles, the supermodel looking as though she was getting a thrill as she smiled whizzing past photographers.

Hang on! Heidi Klum wrapped her arms around Martin Kristen as they rode through Los Angeles on his motorcycle on Sunday

The pair were dressed in matching jeans and black helmets, while Martin went for the classic biker look in a leather jacket.

Earlier in the day, Heidi wished her fans a fun-filled holiday as the world celebrated the patron saint of Ireland.

 

'Happy St Paddy’s day!' she tweeted her 1.3million-plus followers.

The 39-year-old German beauty included a picture of herself drinking a green beverage. 

Matching set: The couple coordinated in jeans and black helmets while Martin went for a classic biker look in a leather jacket

But noticeably absent were her children Henry, seven, and Johan, six, who had joined Heidi and Martin earlier the same day for breakfast in Brentwood.

The blonde bombshell wrapped herself up in a warm white scarf and oversized grey wool cap.

And though she and her beau chose to keep their outfits neutral, son Henry got himself in the St. Patrick's Day spirit, wearing a lime green zip up hoodie.

While the group sipped on their beverages, three-year-old Lou enjoyed a pink cake pop.

Heidi is also mother to six-year-old Johan and eight-year-old Leni.

Heidi and Martin Kristen have become inseparable since going public with their relationship last year following her split from husband Seal.

'Happy St Paddy's day!' The supermodel toasted her Twitter followers with a green beverage on Sunday afternoon

She recently opened up about their romance, but admitted marriage is not in the cards in the foreseeable future.

She told February's Marie Claire magazine: 'I don’t think so. No. No.'

'Maybe if I’m with someone for 15 or 20 years, and we do it in our old age as a fun thing to do... But I don’t have the urgency anymore,' she explained.

The model seems to be far too focused on business at the moment to worry about the status of their romance.
Heidi earlier this month was announced as the latest panelist to join judges Howie Mandel, Howard Stern and Melanie Brown on America's Got Talent following Sharon Osbourne's exit.

Mommy duty: Earlier in the day Heidi and Martin went for breakfast with her children Henry and Lou