Credit: Splash News Online

Like or not, Ben put a ring on it -- and Courtney's ready to show it off.

On Wednesday, Courtney Robertson took a stroll in Marina del Ray, Calif. and looked serene and casual in a plaid shirt, jeans, boots, and one unmistakable accessory: her engagement ring from controversial fiance Ben Flajnik.

It's the first time the 28-year-old model has worn the rock -- a 3-carat cushion-cut custom Neil Lane ring worth about $85,000 -- since she and winemaker Flajnik, 29, announced they were indeed reconciled and engaged on Monday's After the Final Rose special.

Bachelor fans might not be rooting for this particular reality couple to make it to the aisle. After all, after Robertson's catty behavior on the show made her one of the ABC hit's all-time villains, Us Weekly caught Flajnik cheating on his fiancee with multiple women last month.

And despite Robertson's tears and Flajnik's prostrate apologies on After the Final Rose, insiders tell the new Us Weekly, on stands Friday, that it's all an elaborate act.

"He's become a jerk!" one source says of Flajnik.

For much more on their web of deceit -- Robertson's fake apology, Flajnik's latest flings and whether they could possibly last -- pick up the new Us Weekly, out now.