In something of a bait and switch … Pete Davidson‘s girlfriend shared a busty thirst trap that she turned into a baby bump preview.

Model Elsie Hewitt posted the short vid to the Gram Thursday morning … sporting a black bandana and adjusting a bikini top — that appeared to be holding on for dear life — before she backed away from the camera and cradled her tummy. She captioned the post … “my little 🤰🏻”

TMZ broke the story … the ‘SNL’ star and EH were expecting back in July … and they commented on the exciting news shortly after … Elsie posted snaps of them all loved up with the caption … “Welp now everyone knows we had sex.”

As we reported, Pete and Elsie were first linked in March and took their relationship to the next level quickly — we broke the story that they were officially living together.

Pete’s dating history reads like a tabloid hall of fame — with past girlfriends including Kim Kardashian, Ariana Grande, and Emily Ratajkowski.

But, Pete recently said all the attention and gossip about his high-profile flings took a toll … and he was embarrassed and hurt by the constant conversation surrounding his manhood … admitting all the hype made him feel like a sexual object.