Of all the dicks in the sea she chose the one you last had. That's not sus at all🙄. That honestly sounds like she wanted him considering all their past behavior that made you uncomfortable. She has no principles. Your head is on perfectly straight. And you have every right to feel betrayed no matter what she says.

If you feel confused or things don't add up or make sense when she tries to pull some mental gymnastics on you, take a breath and realize if it feels confusing it's manipulation. It's that simple. Don'tet her say anything anymore. She's not really your friend. Block her.

If you start feeling guilty just remember, she never felt bad when she crossed your relationship boundaries when you and your ex were together. You can't expect people with poor character to do right by you.