In her first interview since giving birth to son Tripp, Bristol Palin, daughter of Alaska Gov. Sarah Palin, said it’s not “realistic” to expect abstinence outside of marriage.

Watch: Bristol Palin breaks her silence

“Everyone should be abstinent . . . but it’s not realistic at all,” the 18-year-old told Fox’s Greta Van Susteren, adding that having sex as a teenager had become “more and more accepted now” among people her age.

The new mother, who gave birth to Gov. Palin’s first grandchild late last year, said her decision to go forward with an unplanned pregnancy was entirely her own.

“It was my choice to have the baby,” she said, in an interview that aired Monday night. “It doesn’t matter what my mom’s views are on it. It was my decision and I wish people would realize that too.”

Bristol Palin said she would eventually like marry Levi Johnston, her newborn son’s father. But they’ve “been focusing though on just getting through school and getting an education and stuff – getting a career going,” Palin said.

Palin said she was “excited to be a mom” and described her 2-month-old son Tripp as “awesome” and “very, very, very cute,” but said that other teenagers should not follow in her footsteps.

“I think everyone should just wait 10 years,” Palin said. Being a teenage mother “is not glamorous at all . . . your whole priorities change after having a baby.”

CNN