Teresa, who was sentenced to 15 months in federal prison in Danbury, CT, tweeted from jail on Sunday for the first time since she surrendered to authorities back in early January.
"Thank you everyone for all of the cards, letters, and kind words of support I love, love, love you all xo T!" she wrote.
Teresa has been exercising a lot while behind bars in addition to cooking for her inmates. She has four daughters at home with their father Joe Giudice, who will begin his own 41-month sentence after his wife completes her time.
The reality TV couple pleaded guilty to 41 counts of financial fraud in March 2014. After reaching a plea deal, Teresa and Joe were sentenced on October 2 of last year. The arrangement was made so that one parent can always be with their kids.
Joe recently admitted to Us Weekly he cries more about Teresa being gone than his daughters, calling himself "a baby."
Teresa, 43, will reportedly be released four months early on December 23.