Los Angeles: Actress Jessica Simpson has told by her mother Tina to keep a check on her younger sister Ashlee`s party habits.
Jessica is expecting her second child with fiance Eric Johnson and has soothing effect of Ashlee.
"Tina`s asked Jessica to look out for Ashlee and make sure she doesn`t start partying too hard once again. With Jessica focusing on her second pregnancy, she`s a calming influence on Ashlee because she doesn`t want to go out on the town," radaronline.com quoted a source as saying.
"Instead, she prefers family nights in relaxing and has encouraged Ashlee to join them when they are all together, which she has been doing," the source added.
Ashlee was known to be a hard party person but has mend her ways recently.
"Ashlee`s been looking a lot more like her old self, lately appears a lot healthier," the source said.
"However, Tina has told Jessica to keep an eye on the situation, just like she is, to see if Ashlee falls back into her bad old ways again - only time will tell," the insider reveals," the source added.