"But, we'll just see see what [Taumaunu's] plans are and see what she needs to do."
Williams' ongoing injury issues allowed Grant and de Bruin to play a key role in New Zealand's 2-1 Constellation Cup victory over Australia last month and although de Bruin was deployed in the unfamiliar GD bib, the 1.9m defender said it was a good experience.
"It's a position that I don't really play in the ANZ Championship, but getting in the Ferns environment and playing goal defence I've enjoyed it. I think Katrina and I have been building a nice combination together as well, which is awesome."
As for her secret to being one of the premier defenders in the game while in her mid-30s, de Bruin said it was about training smarter not harder.
"Our training has definitely changed since I've been in the team over the years. It's just looking after the body and listening to it because you kind of know how you feel and if you can't do a session it's not because you're soft, it's because you are looking after your body. So it's just being smarter about it."
Then again, if de Bruin needed any inspiration to keep playing at the elite level she can look across the court to the 40-year-old Irene van Dyk, who has played more than 200 tests for New Zealand and South Africa since her international career began in 1994.
"We always see who feels the worst after training," de Bruin said of her older team-mate.
"But we are still giving the young ones a run for their money so it's definitely good to have her there. As long as she's there I won't be the oldest, so I'm good."
Following 34 appearances for South Africa and 63 for New Zealand, de Bruin is closing in on her own century of test caps and should bring up the milestone shortly providing she takes the court in the remaining three games of the Quad Series.
After New Zealand meet England this week, they will play South Africa in Tauranga on Sunday before wrapping up the competition against Australia in Hamilton next Thursday.
In team news, the Silver Ferns welcomed back mid-courter Millie Lees and shooter Jodi Brown to the squad after they missed the trip to Australia for the opening three games of the Quad Series, while Shannon Francois and Anna Thompson have dropped out.
Although Taumaunu said she was yet to settle on a starting seven to meet England, Lees seems likely to slot straight in at wing attack after the mid-court were particularly poor against Australia on Sunday.
Australia and South Africa will also play in Wellington on Thursday night with their match taking place at 6.15pm before the Silver Ferns and England start at 8.25pm.
