Although she recently tweeted support for and admiration of her boyfriend, Lindsey Vonn is reportedly afraid Tiger Woods will cheat on her with his ex-wife, FOX Sports reported.

Vonn, 28, is allegedly concerned that Woods, 38, will rekindle his romance with ex-wife Elin Nordegren on a summer vacation in Sweden. Nordegren, 33, divorced Woods after his infamous sex scandal with multiple women. They have two children together -- Sam, 5 and Charlie, 4.

A source from The National Enquirer said "Lindsey is convinced that Tiger still has feelings for Elin and, if he got the chance, he would dump Lindsey in a flash and get back together with her."

Nordegren is currently dating Chris Cline, the 53-year-old owner of coal producer Foresight Energy. It was reported in March that the two have been dating "since the holidays."

After her experience marrying and divorcing her first husband, Vonn revealed to Vogue that she is "definitely not getting married to anyone" ever again. She was formerly married to fellow skier Thomas Vonn, 37. She admitted last year to suffering from depression which grew worse towards the end of her marriage. They divorced in 2012. 

Vonn mention that she and Woods "immediately clicked" when they first met and that she doesn't care what anyone else thinks of their relationship:

"But that's the thing: It all comes back to being happy,"she said. "It doesn't really matter what anyone else thinks; do what you love to do and be happy and that's it."

Nordegren has supposedly given Vonn and Woods her blessing. According to Page Six, a source claims she thinks Vonn is a good influence on Tiger and gets along well with their two children.

The couple first went public this spring. Ever since, Vonn has been an active spectator at Woods' tournaments.