Abby had accepted a plea bargain from Ben Warren so her parents didn't have to testify because of her murdering Roy. On her last night with Rick before she went to jail, she asked him to make love to her before she has to leave. But Rick had a better idea. He decided that he would marry Abby before they made that big step and before she went to jail. He took her to a nearby reverend's house and proposed on the doorstep.
Only this time she happily accepted!!