It's their first vacation as a family of four! Teen Mom 2 star Chelsea Houska and her adorable family are currently spending some quality time together while on vacation in Florida — and not only is she giving fans serious FOMO, but fans are dying over how cute and big her new baby boy Watson is getting!

The 25-year-old and her husband Cole DeBoer posted for a family photo with Chelsea's seven-year-old daughter Aubree Lind — whom she shares with her ex-boyfriend Adam Lind — and the couples' son. Even though Chels only gave birth to Watson five months ago, he's already longer than his mama's torso and fans gushed over the adorable baby boy in the comments.

View this post on Instagram

❤️❤️❤️

A post shared by Chelsea DeBoer (@chelseahouska) on

MORE: The New Season of 'Teen Mom 2' Airs Tonight — Find out How to Watch and What to Expect!

"Oh my gosh, Watson's leg rolls," one fan commented, while others told Chelsea that she has an adorable family. Another fan joked, "What a big beautiful baby! Soon enough he'll be carrying you!"

But baby Watson isn't the only one enjoying himself on his family vacation. His big sister Aubree looked so happy on their trip to Clearwater Marine Aquarium, which is a marine animal hospital that helps rescue, rehabilitate, and release sea animals. Chelsea shared video clips of Aubs interacting with the dolphins, and she said that playing with them is her daughter's "dream come true."

View this post on Instagram

Best day ever! @cmaquarium

A post shared by Chelsea DeBoer (@chelseahouska) on

MORE: Adam Lind’s Slender Frame Has Fans Worried About His Health, Drug Use

Even though Aubs looks like she's happy to be a big sister, that wasn't always the case. On an upcoming episode of Teen Mom 2, Chelsea has a very serious conversation with her daughter because she was acting out her jealousy over her new sibling by behaving badly, and Aubs showed a ton of maturity by actually owned up to it.

“It’s just because he’s so cute,” she said, “and when I have to go to bed, you guys get to be with him and I have to be trying to go to sleep. You get to have fun with him, while I’m just sleeping and bored.”

Love Teen Mom? Be sure to join our Teen Mom Facebook group to chat about all the latest updates and juicy gossip!

For access to all our exclusive celebrity videos and interviews – Subscribe on YouTube!