They've survived a grueling tour schedule that has kept them apart for stretches of time, but Donnie Wahlberg and Jenny McCarthy will have an entirely different crisis to deal with on the season 2 finale of Donnie Loves Jenny.  

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As Donnie continues enjoying his tour with New Kids on the Block, Jenny will be at home in Chicago trying to make sure that her son, Evan, has a very special day planned for his upcoming birthday.

"I just want this to be the best birthday that he's ever had," she says in a preview clip for the Wednesday, September 2 episode.

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However, her best plans could go awry quickly after an inflatable bounce house she gets for the lawn during his party proves to be dangerous-after he climbs to the top and slides down with a huge group of friends-but gets injured in the process.

"OW!" he screams in the clip as he walks away from the slide. "My finger's broken!"

McCarthy quickly tries to soothe her injured son as she checks him out-but the party is definitely over.

"Evan come here," she says.

It appears Evan did in fact break his finger during the incident-as McCarthy did post a photo of the x-ray-which shows a snapped bone in her son's thumb .

Donnie Loves Jenny airs Wednesdays at 10 p.m. on A&E.