Palin "Political Suicide" if She Shuns Levi?

Bristol Palin and Levi Johnston's on-again engagement appears to be good news for the them, but how does this bode for Johnston's mother-in-law-to-be, Sarah Palin?

The Palins and Johnston engaged in a public war of words when the couple broke off a previous engagement.

But political experts say Palin simply has to grin and bear this one, just like a mama-grizzly, reports CBS News correspondent Elaine Quijano.

Patrick Gavin, a Politico.com staff writer, says, ""I think, if Sarah Palin came out and said she refused to accept the engagement, I think it would be political suicide for her. To not support her daughter on this decision, whether you agree with it or not, would not bode well in her favor."

For Bristol, the rollercoaster ride may finally be coming to an end. After months of battling with her ex-fiance over child support and his critical comments of her family, the two have managed to patch things up. Now with the engagement back on, Palin's rollercoaster ride may just be beginning.

Bristol and Johnston, along with their baby boy, Tripp, posed as the picture perfect happy family for Us Weekly in their home state of Alaska.

They've come a long way since 2008, when Bristol was introduced to America as the six-month pregnant daughter of then Republican Vice Presidential Candidate Sarah Palin.

Shortly after their son Tripp was born, the relationship between the Palins and Johnston began to fray, Quijano points out.

Johnston claimed Bristol wouldn't let him see his newborn son. Johnston blasted Palin in an interview with Vanity Fair last October, saying Palin rarely acts as a parent.

Palin got her revenge later on that year on "Oprah," only to get another rebuttal from Johnston when he appeared on "The Early Show", telling Maggie Rodriguez he doesn't see himself back at Palin family events like Christmas at the Palins' home.

But despite the verbal lashings, their icey relationship is beginning to rewarm, notes Quijano, with political observers asserting that, because Bristol and Johnston have reconciled their relationship, Palin has no choice but to give them her blessing if she has presidential aspirations.

In a statement, Palin says of her daughter's decision, "Bristol, at 19, is now a young adult. As parents, we obviously want what is best for our children, but Bristol is ultimately in charge of determining what is best for her and her beautiful son. Bristol believes in redemption and forgiveness to a degree most of us struggle to put in practice in our daily lives."