Medical tests discovered a tuberculosis infection in her spine which resulted in Situ entering a two-year semi-coma, and was left with paralysis from the fourth vertebra down, leaving her requiring the use of a wheelchair.

[1] Situ first came to the international stage in 1998 when she represented South Africa at her first IPC Athletics World Championships, held in Birmingham, England.

[1] Two years later she successfully defended her javelin world title in Lille, but despite adding almost two meters to her discus distance from Birmingham, it was only good enough for a fourth-place finish.

[3] After Athens, Situ entered a barren period competitively, failing to reach the podium at the 2008 Summer Paralympics in Beijing.

At the 2012 Summer Paralympics in London Situ threw a distance of 16.22 metres, but she fell short of the podium in fourth place.