In the one act play Trip To Bountiful, Jessie Mae is the daughter-in-law. She is selfish, and only concerned with money and what she can buy with it. She is using her mother-in-law's monthly check to pay for her hair,nails,dresses, and all the little extras she wants to buy. I would act out this role as a spoiled brat who always wants her way. You might watch the movie before acting out the part.
You can learn more about this play at the link provided.