It’s hardly an easy task.

But Casper Smart proved he’s quite the gentleman as he attempted to cover up Jennifer Lopez’s shapely behind.

Her dancer toyboy held up a large bath size white towel as she climbed out of the pool in Miami, valiantly protecting her modesty.

Jennifer herself didn’t seem bothered, happily showing off her behind as she splashed around her hotel pool with her four-year-old twins Max and Emme.

No easy task! Casper Smart proved he’s quite the gentleman as he covered up Jennifer Lopez’s shapely rear during their Miami vacation

Doing his best: The towel got wet in the pool, but Casper managed to cover up J Lo

Just the two of us: Jennifer later joined boyfriend Casper Smart in the pool for another dip

So far during her vacation she has been seen slipping into a variety of colourful poolside ensembles.

However, the 43-year-old singer was still ever the bathing beauty, showing off her sensational curves in the bikini, which featured an asymmetrical strap around the shoulder.

The semi-strapless two-piece attire effortlessly displayed her sculpted abs and toned thighs.

Bathing beauty: Jennifer Lopez showed off her sensational curves in a black bikini today as she took her twins Max and Emme to the pool at their Miami hotel

The Latina beauty slicked her hair back in a bun to enjoy the refreshing dip, but was not afraid to get it wet as she played around with her children.

She shielded her eyes from the sun with a pair of retro-inspired gold rimmed sunglasses and accessorised with big gold hoop earrings and a gold Hermes cuff.

Earlier, she had arrived at the pool wearing a retro-inspired kaftan and black wedges with zig-zag detailing on the heel.

Super toned: The semi-strapless two-piece attire effortlessly displayed her sculpted abs and toned thighs

Hand in hand: Jennifer held Emme’s hand as they made their way in the water slowly

The singer also joined her boyfriend Casper Smart for a dip, and the pair seemed to enjoy some alone time as they waded in the water together.

It seems things may be heating up for the couple, who began dating after Jennifer’s split from Marc Anthony.

In a recent interview, the Dance Again hitmaker admitted she’s looking forward to perhaps one day having children again, and is longing to have a big family.

Low-key: The Latino beauty slicked her hair back in a bun to enjoy the refreshing dip, but was not afraid to get it wet

Relaxation: Jennifer is getting in some relaxation time this afternoon at her South Beach hotel ahead of her big performance tonight on stage with Enrique Inglesias at the American Airlines arena

She told The Sun: ‘I haven’t closed shop in that department.

‘I don’t know, we have to see — we only have so many years that you can do that.’

She added: ‘I am a lover. I mean, at my core I feel like that’s such a big part of my personality — and a part of why I do what I do — because I have so much to say on that subject.

‘I feel like that’s what my life is about.’

Splashing about: The singer was seen spending some quality time with her twins, including daughter Emme

Lift off: J-Lo was seen giving her son Max a lift in the water

Jennifer was getting in some relaxation time at her South Beach hotel ahead of her big performance on stage with Enrique Inglesias at the American Airlines arena.

The pair are currently on her Dance Again tour, on which Casper serves as head choreographer.

After their vacation it is back to work for the two. And today they were seen boarding a private jet together, their pool time obviously at an end.

Alone time: The singer wrapped her legs around the toyboy while they waded in the water

Give me a lift! JLo hiked it on Casper’s back as he walked along the bottom of the pool

Happy together: Casper flashed a wide grin as he splashed around with the star

JLo announced she was leaving American Idol back in July in order to focus more on her family and film career.

Fellow judges Steven Tyler and Randy Jackson have also announced their departure.

News came this week that Jennifer will be one of the first guests on Katie Couric’s new talk show, in a line-up which includes Barbara Streisand and Jessica Simpson.

Is that what she sees in him? Casper showed off his chiseled abs poolside

Couric’s new show Katie, which launches September 10, is expected to talk to J-Lo about life after American Idol.

Jennifer recently told The Associated Press: ‘I do miss doing films. I feel like the last two years with Idol, I’ve really, really focused on, you know, my music.

‘It was all kind of very synergistic, it worked really well together.

‘But [film] is something that I really loved, it’s how I kind of started in this business, and it doesn’t leave you. I am an actress, I need to do that, too.’

Retro: Earlier, she had arrived at the pool wearing a retro-inspired kaftan and black wedges with zig-zag detailing on the heel

Mellow yellow: Jennifer was also seen poolside on Thursday in this bright yellow fringed bikini

Fun in the sun: She was joined by her boyfriend Casper, and the pair had a ball with the twins when they had their own little pool party

Bohemian: JLo slipped into this bohemian-style kaftan to go for lunch with Casper yesterday

In 2013, Jennifer will star in the thriller Parker, a film adaptation of Donald Westlake’s book Flashfire.

She recently appeared in ensemble comedy What to Expect When You’re Expecting alongside Cameron Diaz and provided the voice for Shira the sabre toothed tiger in Ice Age: Continental Drift.

The holiday’s over! J Lo carries Emme and walks beside Casper as they head onto her private jet together today

Traveling in style: J Lo is currently on tour with Enrique Iglesias