First daughter Tiffany Trump, and President Donald Trump's ex-wife, Marla Maples, were spotted aboard a luxury yacht in Italy on July 15.

Maples and Tiffany were vacationing on the 130-foot charter yacht Mirage IV with friends, a crew of eight and Secret Service agents, the Daily Mail reports.

The president's youngest daughter wore a white bikini top and green bottoms, while Maples wore a lilac bikini and sleeveless jacket.

Both lounged and sipped drinks in the sunshine, although Tiffany was spotted briefly taking a dip in the sea.

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Their vacation and photos captured the attention of social media users, who were quick to voice their opinions.

Some were upset the two had taken Secret Service guards along.

"They have the option not to use the secret service and hire private security," wrote one Daily Mail reader. "Of course they choose the fleece American taxpayers. Even worse, his ex wife gets secret service coverage as well during this little jaunt. If the dumb b's would stay off social media nobody would know where they are and I highly doubt that anyone cares either. Pathetic."

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"The con man-in-chief is costing taxpayers more than any previous president, between protecting his very large family and his weekend trips to FL and NJ," added another. "In travel expenses alone he spent in his first three months more than Obama did in one year."

A few criticized Tiffany for vacationing while her father "is killing innocent people in Syria!"

Others jumped into defense mode.

"No one has ever kept track of how many relatives of a President had a secret service detail, therefore we have no way to know that the current First Family has anymore than previous Presidents," argued one person.

"Tiffany is costing the taxpayers pennies compared to what is being spent on investigating [the president], his other kids, and his minions," opined another.

Many were less interested in politics. Instead, they paid more attention to the appearance of the two women in the photos. Some were complimentary.

"Marla has a natural beauty to her that is stunning," one person commented. "It's refreshing to see a mature beautiful woman instead of the desperate botox/surgery craziness we normally see."

"I like her," wrote one about Tiffany. "Hate her dad, but she's done nothing wrong. By the time Ivanka was her age she had a ton a plastic surgery. this girl looks fine without it."

Some were much more critical.

"When your Mom is hot and you are not…," quipped a commenter, while a few even called Tiffany "chubby."

Many rushed to their defense, accusing critics of body shaming.

"Shame on you people for judging someone on their physical appearance," wrote one person on the Daily Mail's Facebook page.