We know Jamie Lynn Spears isn't a fan of safe sex.

Well, apparently she's equally opposed to automobile safety practices! Nice!

Despite her ever-growing baby bump, the pregnant 17-year-old forgot to buckle her seat belt as she rode in the passenger seat of her mother Lynne Spears' SUV.

Britney's not the only Spears who can't figure the car thing out.

Jamie Lynn Spears' most recent lapse in judgment can be seen on a video posted on TMZ as the two left a jewelry store in Kentwood, La., Thursday.

Jamie Lynn, whose parents are named Jamie and Lynne, reunited with her ma this week after months apart. Lynne had been in Los Angeles looking after her other train-wreck, traffic-safety-rejecting daughter, Britney Spears.

At the very least, though, Jamie Lynn had been spending a lot of time with fiance / baby daddy Casey Aldridge. Both celebrate birthdays in April!