Bachelor's Zilda Williams & lookalike mum Gilda stun Bondi

How can one person be in two places at once?

That was the question on everyone's lips after Australia's Mary-Kate and Ashley stunned Bondi Beach with a scorching display of genetic perfection on Friday.

But it turns out the jaw-dropping flashing-of-flesh was no sister act, but rather lookalike mother-daughter duo of Zilda and Gilda Williams.

How can one person be in two places at once? Was the question asked after Australia's Mary-Kate and Ashley stunned Bondi Beach with a scorching display of genetic perfection on Friday

How can one person be in two places at once? Was the question asked after Australia's Mary-Kate and Ashley stunned Bondi Beach with a scorching display of genetic perfection on Friday

 Daily Mail Australia has followed the sisters with a secret ever since swimsuit model Zilda appeared on just one episode of The Bachelor in 2015.

Although judging by Friday's double D act that saw both mother and daughter stun in skimpy bikinis, fans would be fair to question if it was Gilda on the show all along.

Both were seen emerging from the water, Zilda wearing a tad more clothing thanks to the extra length on her yellow-and-white striped briefs.

Sister Act: But it turns out the jaw-dropping flashing-of-flesh was no sister act, but rather lookalike mother-daughter duo of Zilda and Gilda Williams

Sister Act: But it turns out the jaw-dropping flashing-of-flesh was no sister act, but rather lookalike mother-daughter duo of Zilda and Gilda Williams

That's where she gets it! Both were seen emerging from the water, Bachelor star Zilda wearing a tad more clothing thanks to the extra length on her yellow-and-white striped briefs

That's where she gets it! Both were seen emerging from the water, Bachelor star Zilda wearing a tad more clothing thanks to the extra length on her yellow-and-white striped briefs

Shady! The brunette's assets were barely contained by a white bikini top, the outfit complete with a pair of aviator shades

Shady! The brunette's assets were barely contained by a white bikini top, the outfit complete with a pair of aviator shades

Spot the difference: Next to her was age-defying Gilda, who stunned in a trippy rainbow two-piece, adding to the confusion by also sporting sunglasses

Spot the difference: Next to her was age-defying Gilda, who stunned in a trippy rainbow two-piece, adding to the confusion by also sporting sunglasses

The brunette's assets

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