I lied to my ex so I could sleep with them
Why did you need to lie to your ex?
I wanted to sleep with her at the time.
You shouldn't lie to your ex just to get them to sleep with you. She's gonna be upset if she found out you lied to them.
I know. But the sex was too good to past up.
That's terrible of you. Lying to get her to sleep with you is probably why she's you ex, not current, girlfriend.