Ex "Teen Mom" star Amber Portwood is savoring every moment after 17 months behind bars -- reuniting with her 4-year-old daughter on Monday -- and TMZ has the photos.
As we reported, Amber was originally sentenced to 5 years in an Indiana prison for violating probation in her drug possession case, but she was released early for good behavior and time served.
Sources tell TMZ, as soon as Amber got out she made a detour to a burger joint called Frisch's Big Boy -- and then beelined to see Leah ... who's been living with her dad while Amber was locked up.
Amber's baby daddy, Gary Shirley, currently has full custody ... but we're told she's planning to seek shared custody ASAP.
FYI, Amber now insists she's 100% sober.