In the heart-warming social media post, we can see the former TOWIE star gazing down at his girlfriend while clutching a copy of Tom Fletcher's The Christmasaurus.
Along with the snap, Mario wrote: "Reading her the #Christmasaurus before bed as she is a poorly little monkey @beckymiesner1." Aww!
Being the ever-doting boyfriend, Mario made sure his girl was kept warm and cosy under a blanket while he read the book, which was written by his sister Giovanna Fletcher's husband, Tom Fletcher. Oh, and he's also in this small band called McFly - talk about talented!
Mario's pretty much in both of their good books with this one, right?
Mario and Becky first revealed they were dating back in August and since then, things have been going extremely well for the pair. So good, in fact, that they even recently moved in together.
And it looks like Mario is already gaining some brownie points by taking care of a poorly Becky. Get well soon, Becks!
When they first moved in, an excited Mario took to Twitter to reveal the happy news, writing: "Today I am a happy man.. My girlfriend has moved into mine and made it our home."
Of course, with Mario being an uncle to Giovanna and Tom's kids Buzz Fletcher and Buddy Fletcher, the Essex boy may even be thinking of starting his own family soon.
Speaking to Reveal in the past, he has said: "I would love to have that, but I don't want to rush into something with the wrong person. It will happen when it happens."
We're holding out high hopes for Becky and Mario - imagine how adorable their children would be!