S3·E16 A New Kind of Christmas

Mel's sister, Meredith (Jaime Pressly), comes home from prison on furlough to celebrate Christmas with the kids and Mel, and seems unruffled by Joe's obvious animosity towards her. Note: this episode is a Christmas special and was only put in after EP15 because it was near Christmas. Episode 15 ends on a cliff hanger and is continued in episode 17.