The Big Reunion and Liberty X star was distraught when her five-week-old baby was admitted to hospital earlier this week and diagnosed with viral meningitis and reflux disease.
Yesterday, the worried mother was allowed to return home with her son, but admitted she won't be able to rest easy until still-recovering Aaron is given the all-clear.
Michelle tweeted: "Our beautiful baby boy Aaron Jay Hanley is home now and we couldn't be happier. It has been hell, I'm not going to lie, and only time will tell if Aaron has been physically or mentally affected 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."
Michelle added that her daughter Faith, two, had been "the best big sister", providing comfort to her little brother and that now the reunited family is looking forward to lots of cuddles and time together.
"I love my family, more than words can say," she concluded, before describing personal trainer husband Hugh Hanley as their rock.
Singer Michelle gave birth to son Aaron on 28 February.
Michelle had previously said Aaron's health problems were scarier than learning she is a carrier of the BRCA2 gene, which prompted her to undergo a double mastectomy and make plans to have her ovaries removed in order to reduce her risk of cancer.
"With everything I've been through mentally and physically nothing, I mean, nothing compares to that of when your baby is sick," she said.
"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 and taking the antibiotics well so far. But at only five weeks old one can only imagine our 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."
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