Despite the fact that Mathews was holding on tight to his son, and the baby's face was covered by a stylish fedora, the negative comments came flooding in.
One person thought Greyson was too young (and small) to even be in a pool, while another wrote, "Put sunscreen on that child," assuming the parents hadn't already done so.
A few minutes later, the reality star fired back at all the haters and insisted that she knows how to take care of her kids. Her long post was written on an Instagram photo of the sunscreen haters claimed she didn't use.
"Not even sure why I am even doing this but I feel like schooling people on my previous post," JWoww began her caption.
"First off, my son is two months and in a salt water pool up to his belly... Probably for a total of 3 minutes. But second is where I need to really educate trolls... Let me explain to the haters that decided to comment about no sunscreen and the dangers bla bla bla," she continued.
The mother of two went on to explain that her son was indeed protected from any harmful rays through her own sunscreen concoction.
"My son actually does have sunscreen on. It's the same concept as diaper cream. Probably even better than the crap sh*t you lather your children in," she wrote.
JWoww then proceeded to go into detail about her homemade sunscreen to shut down all of the rude commenters once and for all.
"Remember a** holes im in the tanning industry and pride myself on knowing this. So, here is what I mixed for my son so I know for the 2 minutes he would be safe," she explained before adding the recipe.
"Coconut Oil- SPF 4-6. Zinc Oxide SPF 2-20 depending on how much used. Carrot Seed Oil – SPF 35-40... Go enjoy your Sunday now," JWoww ended the post.
Over the weekend, JWoww also found time to get herself a mommy makeover! The 30-year-old star decided to say goodbye to her "mom look" and try something totally different with her hair.
"So... I've had my babies and now it's time for me to get rid of my mom look... I Was going to wait until I lost a few more lbs, but I'm impatient and want a new look for the rest of the summer," she wrote alongside a photo of her being blindfolded before her hair appointment.
On Friday, she revealed the new "fun, edgy and completely different," 'do on her Instagram.
"Oh hey guysssssss I am beyond obsessed with my hair @joeidfox," she captioned the snap, which showed off her new black and grey ombre locks.
"This look is giving my life thank you @snipteasehair," she added.