Former South Carolina governor Mark Sanford (R)  and his now-ex-wife, former first lady Jenny Sanford. (Associated Press)

Former first lady of South Carolina Jenny Sanford on Monday ended speculation that she would run against her ex-husband for an open congressional seat in the state's first district. 

"I think my job as mom right now is much more important, much more rewarding and much more productive," Sanford said, according to an AP report.

"The idea of killing myself to run for a seat for the privilege of serving in a dysfunctional body under John Boehner when I have an eighth-grader at home just really doesn't make sense to me," Sanford added. 

Sanford had said earlier that she would consider running for the seat, which was vacated when Tim Scott (R) was appointed to replace Jim DeMint (R) in the Senate. Sanford was on current Gov. Nikki Haley's shortlist for DeMint's seat; the Republican governor appointed Scott. 

Mark Sanford, the former governor who became famous in 2009 for admitting to an affair with an Argentinean woman, represented the 1st district in the House from 1995 to 2001. He's planning his political comeback with a run to reclaim it.

Mark and Jenny Sanford split soon after his public confession, and Mark Sanford is engaged to his former mistress.