Me and my current LTR have been together for about 4-5 months. Its a good relationship, I get what ever I want and she basically treats me very very well.

I am not going to go into major details but she ended up lying to me about something that was very insignificant. She said she lied because I was already upset and she "did not want to upset me or make me angry anymore then I was" at her. I straight up call her out on her lie. She is now upset and feels extremely guilty for lying to me about something so little. I tell her "you lie to me again about something small or big again and I will not be sticking around". We then make up and go about our day normal.

She doesn't have any history of cheating, seems very loyal and always tries to please me. This situation has now rubbed me the wrong way.

How did I handle this? In the future if I do catch an LTR in lie what should I do?