Bristol Palin Wants More Kids – Just Not Right Now

By Eunice Oh

07/15/2010 at 05:00 PM EDT

Now that she's engaged, Bristol Palin is already thinking about expanding her family. It just won't happen anytime soon.

"I'm going to wait a while, definitely," she tells PEOPLE. "I'm not going to rush into having another kid."

Bristol, 19, who reconciled with former boyfriend Levi Johnston, 20, says their 18-month-old son Tripp "will have a brother or sister, eventually."

RELATED: Levi Johnston's Mom and Sister Hope to Be Invited to the Wedding

Having earlier said she hopes the three of them will now "be a family," Bristol also hints the couple could have an even bigger household, given that she enjoys being around a lot of kids.

"I miss my home because I've got my little brother running around there. I've got all my little sisters, and I just miss that," she says.

"And that's why Willow and Piper and Track are always out here," she adds. "I just miss that environment."

• Reporting by SANDRA SOBIERAJ WESTFALL

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