She tweeted on Wednesday: "Our beautiful baby boy Aaron Jay Hanley is home now and we couldnt be happier. It has been hell, I'm not going lie and only time will tell if Aaron has been physically or mentally effected with having had viral meningitis.
"But the chances are slight so we just pray he will be one of the lucky ones! We certainly are to get our little man home. Faith has been the best big sister ever, nursing him every day, now time for Lots of cuddles and family time.
"I love my family .. More then words can say! & @hughhanley is our rock! Luv you baby xxx"
Twitter followers shared in Michelle's joy and relief; they had, after all, been following little Aaron's progress ever since the former Liberty X star tweeted about his illness last Sunday.
"The last 24 hours has been the worst and scariest in my life. With Everything I've been through mentally and physically nothing, I mean nothing, compares to that of when your baby is sick.
"Our beautiful baby boy has been very looked after in hospital after being diagnosed with viral meningitis.
"And reflux disease just to top it off. He's fighting strong & taking the antibiotics well so far.. But at only 5 weeks old one can only imagine our @hughhanley distress as parents.
"He's very sick and in pain with the reflux. The hospital are amazing and he's well looked after. Hopefully we will be able to take our little man home soon. I'm sure we will."
Michelle gave birth to Aaron Jay, her second child with husband Hugh Hanley, on February 28th. And Michelle, who is also mother to Faith, 2, has revealed that she will be having surgery to remove her ovaries following her diagnosis of the BRCA2 gene.
Untreated, the BRCA2 diagnosis gives those with the inherited gene and 80% chance of developing breast cancer and 30% chance of developing ovarian cancer – meaning the singer has already been forced to make the incredibly difficult decision of having a double mastectomy.
Fingers crossed that little Aaron makes a full recovery.