on Thursday, with a second shot of her gazing over her shoulder.
She captioned the post: "Getting some Vitamin Sea," with a wave and sparkled emoji.
FANS' COMMENTS
Fans were kind in the comments, praising her for showing off her figure proudly.
One commenter wrote: "such a hottie!!! Love that color on you!"
Another supporter commented: "Rocking that old school 90s bikini."
Someone else chimed in: "GET IT GODDESS!"
A fourth fan wrote: "Confidence is beautiful asf!"
There were, of course, some critics.
Several haters commented things like: "Like why" and "unnecessary."
Another wrote: "There's the ocean since you are thirsty."
Someone else commented, "Wrong app," suggesting the post was better suited for OnlyFans.
In that same vein, another hater added: "Umm.. this isn't only fans lol."
'NO SHAME'
The mother of three joined OnlyFans in May and is charging fans $20 monthly.
Jenelle included her decade-long run on MTV in her bio and noted that she's a "Popular Social Media Influencer on all platforms."
Hours later, her husband David, 33, also joined OnlyFans and stripped down to his underwear for his first photo.
Jenelle recently hit back at trolls for criticizing her new business venture.
The Teen Mom 2 alum teased the sexy side she shares on her OnlyFans account in a TikTok video.
In the clip, she posted photos with her three kids, Jace, 12, Kaiser, seven, and Ensley, five, and wrote: "I'm a good mother first..."
The video then cut to sexy snaps of Jenelle in a sheer negligee, a see-through bra, and posing in a bra and cowboy boots.
The former TV star declared in the text: "Whatever I do second is none of your business."
She captioned the clip, "No shame in my game," with a devil emoji.