England find themselves in a dominant position against South Africa in their one-off Test, with the hosts retiring on 417/8 before ending day three by leaving South Africa on 55/3.
Issy Wong claimed the wickets of both Laura Wolvaardt and Lara Goodall late on, leaving South Africa needing 78 during Thursday's play just to make England bat again.
Wong wasn't initially in the squad for the Test match and was only introduced after Emily Arlott failed to recover from Covid-19 in time.
But the 20-year-old took the opportunity with both hands and has made an impression during her Test debut.
The fast bowler claimed one wicket in South Africa's first innings, and took her tally up to three with two late wickets in day three as she continued to look the most dangerous of England's bowlers.
Having stumbled into the team by chance, Wong described her debut as a "dream".
"It's something that I've probably been dreaming of since I started playing cricket when I was five so just to be able to live that dream has been really special this week," said Wong.
"My mum had a little cry, my dad didn't. It was probably something I wasn't expecting at all.
"It hasn't sunk in yet to be honest but I'm sure in the next couple of weeks or so I can put my feet up for a couple of days then it will begin to sink in a little bit."
With more wickets needed in day four of the Test on Thursday, Wong was keen to not overthink her performance and to instead simply enjoy the experience.
"It's been wild to be honest. We've had a bit of everything, we had some nice weather, we had some rain, we had some wickets and some runs it's probably had everything so far," Wong said.
"But I'm really enjoying it, probably didn't think it was going to happen until a couple of days ago so just trying to - I guess not think too much about it and just enjoy it for this one, but equally trying to impact the game as much as I can."
South Africa resume on day four at 55/3, with captain Sune Luus and Tumi Sekhukhune continuing on four and one respectively.
Play resumes at County Ground at 11:00 BST.