Snooki, the star of MTV's "Jersey Shore," is dropping some bad habits as she gets squared away for motherhood, sources tell

The expectant party princess has apparently quit drinking and no longer chases boys around after learning she is pregnant.

Snooki comes from a close family, which sources said is making it easier for her to adapt to the responsible lifestyle of single motherhood.

As for the rest of the "Jersey Shore" gang, the change in Snooki's status from carouser to a more serious lifestyle is likely to trigger an overall shift in the show.

Snooki and co-star Jwoww will be spinning off another reality series that focuses on their evolution into presumably responsible adults.

TMZ said, however, that doesn't necessarily mean Snooki will be marrying her boyfriend.