Adjusting scissor 'tension' via the center screw after sharpening them is always a bit difficult.
Like "Goldilocks and the Three Bears", getting the center screw tightened 'perfectly' to an individual's hand strength is a matter of 'too loose', 'too tight' & 'just right'.
If you were to use the same scissor yourself, you could oddly find the scissor working just fine for you.
Regardless, you could try tightening/loosening the center screw yourself, if you wish, to improve your wife's results, hopefully.
But feel free to return the scissor (helpfully with the previous ticket # 92251) to the store & tell me to tight/loosen the center screw for you.
It's also possible for older scissors that the threads of the center screw are somewhat 'stripped' from regular usage over time.
In this case, I can 'adjust' the tension once more, but the tension won't 'hold' because of the previous thread damage.
This is rare but 1 in 20 I'm afraid.
Contact me via Douglas@GreaterHoustonSharpening.com as you wish but please mention #92251/LGH.
Thanks for taking the time here to let me know what you think about GHS.