08/27/2009 at 09:00 AM EDT
Jon Gosselin will head to Las Vegas Friday, but this time the woman by his side will be his mother, he tells PEOPLE.
"I always promised my mom I'd take her to Vegas to see the shows and that kind of stuff," he says. "We're just going to do our own thing."
The reality star is scheduled to host a pool party Saturday at MGM Grand's Wet Republic – and said he'll be taking Mom there, as well.
Currently, they intend to head for home Monday or Tuesday, but plans can change at the last minute because of his work schedule, he says, adding, "I always tell my Mom to pack extra because I have no idea."
Jon's mother, Pamela Gosselin Castello, 63, also lives in Pennsylvania.