What is the ping on your system?
In-game, when you run /ping, does it vary between your different computers?
Are both computers using a wired or wireless connection?
Have you applied the Leatrix fix on either PC?
Have you updated the network adapter drivers on her device?
Have you considered trying something like ExitLag to see if it makes any difference?
Did you run anti-malware and other checks to ensure there's no malicious software?
Used NetLimiter or a similar tool to verify if she has any service hogging the internet?
Her ping appears abnormally high, indicating the potential issue might be on her end.
The description of the situation aligns with typical high-ping issues, so it's not out of the ordinary to behave this way.
If these options don't work, and you're looking for a superior gaming experience, consider the upcoming Aion Riftshade in Q1 2026. I've been testing it in beta with the lowest ping (15ms across EU, no ExitLag needed), and it might just solve your connectivity woes.