Step-Grandma Jackie

It has been a while since your grandfather Jim married anew after the death of your grandmother (and his wife, duh) Gladys. You learned to know your new step-grandma Jackie only a couple of weeks before both married. After that, they went for their honeymoon and you didn't have a really good chance to learn to know Jackie well. It seems a good idea to visit your grandfather and his new wife at their house, right? Unfortunately your grandpa is on a short weekend trip with his war veteran buddies, so Jackie is home alone... No one in this scenario is blood related.