In the first snap she can be seen spraying graffiti on a wall as she adds to some of the artwork that has already been done.
She captioned the picture: “Education + art = Aids free future @UNAIDS x vb.”
In another photo, she can be seen kneeling down as she hugs a young boy, alongside which she wrote: ‘Inspiring day in Soweto visiting @hivsa with @ejaf x vb ‘.
Victoria, 40, also made the time to have a chat with a group of young women and can be seen sitting on the grass with them as they tell her their stories.
Her visit to South Africa follows her appearance at a press conference at the United Nations building in New York last month, where she said she was “honoured” to have beeen made an ambassador for their UNAIDS campaign.
She told the audience: “I am mother and I am a woman. I will do whatever I can to raise awareness. I feel very passionate about this.
“I recently visited South Africa and was so touched by the women I met and felt inspired. I came home and I knew I had to do something.”
She continued: “It’s taken me to get to 40 to realise I have a responsibility as a woman and as a mother. For some reason people will listen to me. This is the beginning of an incredible journey for me.
“I have people mentoring me. I am going back to South Africa in a few weeks and then further afield next year.
“I would do anything for my children and I think every woman has the right to health and every woman has the right to give their children a healthy future.”