Serena Williams shares new photo from her babymoon vacation in Mexico

Serena Williams made a big announcement on Snapchat earlier this week when she shared (and then deleted) a photo of her baby bump with the caption "20 weeks" from her vacation in Mexico.

Now the top-ranked female tennis player has shared another shot from that babymoon getaway that's she's on with fiance Alexis Ohanian.

"With great power comes great responsibility" Uncle Ben 🕷🕸

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The latest photo shows the champ standing alone at the edge of Mayan ruins in Tulum and looking out over the Caribbean.

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What was she contemplating during that tranquil moment of reflection? Her caption offers a hint: "With great power comes great responsibility."

That's a line from Marvel's "Spider-Man," issued as a warning from the superhero's uncle, Ben Parker. But it's not hard to imagine how it might apply to a powerful personality like Williams who's approaching one of life's biggest responsibilities.

A few days ago, Williams shared another glimpse of shore-side fun from a few months earlier.

My only regret is not pointing my toe sorry coach Garry 🙈

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In the photo, Ohanian lifts her up in his arms during their January trip to New Zealand.

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Given that she's 20 weeks along now, Williams would have been pregnant at the time of the pic — just as she was days later when she won the Australian Open.

Spidey has nothing on this superhero!