It appears letting his father-in-law tag along during a stop on his recent tour proved to be a big mistake for Donnie Wahlberg.

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In a new preview clip for the Aug. 12 episode of Donnie Loves Jenny, the New Kids on the Block singer and his band appear to find themselves upstaged during a show -- by none other than Wahlberg's father-in-law, Macky, who has a party bus and appears to be throwing a rocking party.

"Old Mack Daddy had a bus, E-I-E-I-oh...." Jenny McCarthy sings in the clip.

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The single Macky appears to be ready to take on the hordes of groupies and screaming fans and making sure they're distracted away from Donnie -- even though it potentially comes at the expense of his son-in-law's show seeming less entertaining than the party he's throwing on his bus.

"They're putting on a bigger show off-stage, than we're putting on onstage!" Wahlberg says in the clip.

However, Macky is definitely having himself a grand old time during the party, drinking and laughing, and cozying up to the women he hoped to find when he first met up with his son-in-law on the tour.

"It's getting hot in here!" he shouts in the clip. "Take your clothes off!"

However, it appears that any conflict his actions cause will quickly blow over, as Wahlberg and his band mates will eventually make it to the party themselves -- and may wind up even finding the whole situation to be pretty funny.

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