As the OP's friend has enough credits in both Sweden and the USA to qualify for pensions from both countries the totalization agreement isn't really applicable. However, this paragraph in the link is interesting.
If you qualify for Social Security benefits from the United States based only on U.S. credits and an “ATP” pension from Sweden based only on Swedish ATP credits, the amount of your U.S. benefit may be reduced. This is a result of a provision in U.S. law that can affect the way your benefit is figured if you also receive a pension based on work that was not covered by U.S. Social Security. Receipt of a Swedish “basic” pension, which is based on residence in Sweden, won’t affect the way your U.S. benefit is figured. For more information, call our toll-free number, 1-800-772-1213, and get the publication, Windfall Elimination Provision (Publication No. 05-10045). If you are outside the United States, you may write to us at the address in "For more information" section.
The OP's friend needs to find out about the source of her Swedish pensions. If she receives a pension from a Swedish company or the Government that was paid for with non-SS income her US SS will be reduced by WEP. But it also says that there's another "basic" Swedish pension that is based on Swedish residency and recepit of that won't reduce US SS, but if you don't live in Sweden I assume that doesn't come into play.
Another thing to consider is taxation of the pensions. That will depend on the OP's friend's citizenship and residency status and the US/Sweden tax treaty. In many cases SS payments are only taxable in the recipients country of residence so she may need to get Sweden not to take tax out.