Yeah, that empty cart issue is basically because retailers store those items in your specific browser cookies or local session. It wont ever show up for her just by copying the address bar link. Ive run into this a dozen times trying to coordinate group buys and it is honestly such a headache if you dont use a dedicated tool. I would suggest looking into an extension like Share-A-Cart because it actually bundles the items into a unique code that anyone can load. It is way more reliable than just sending a dozen individual links and hoping she adds the right quantities. You might want to consider the privacy aspect though. Some of these plugins can be a bit invasive with permissions, so make sure to check what data they are accessing before you install anything. Another thing to be careful about is the pricing. If you have specific coupons or loyalty discounts applied on your end, they might not carry over to her session. I would suggest she double-check the final total before hitting buy because the prices can jump if she isnt logged into the same rewards tier as you. Also, some sites will clear the cart if the items go out of stock while the link is sitting in her inbox, so tell her to open it sooner rather than later. It works well most of the time but you definitely gotta be cautious with those session-based links.

^ This. Also, I have to disagree slightly on it being impossible. It is actually possible if you use a middle-man tool like Share-A-Cart. It scrapes the SKUs and serializes them into a shareable ID that bypasses the cookie restriction. It is a decent option when you have a lot of items for a trip. TL;DR: Use a cart sharing extension to bypass session-locked cookies.

Yep, this is the way