Lie to my mom or stand up to her and risk losing relationship?

I’d like to start off by saying I am 30 lol I lie to my mom/don’t tell her things a lot because when I was being honest with her we would just fight a ton and I hated being around her. She’s pretty old school and conservative and while I’m actually pretty tame, she thinks I’m insane. I already don’t spend much time with her as it is so I choose to lie to her to avoid fights with her when we are together. This works fine but it does make me feel like a bad daughter.

Anyway, my sister is the complete opposite and tells my mom everything including what I tell her. If I don’t specifically say “don’t tell mom” I already know my mom knows. The difference is also my sister is an angel, she doesn’t drink, go out and all she does is stay home with her cats.

I’m currently traveling in Mexico as I work fully remote (where I am from and Spanish being my first language) and was staying with family but will be making a layover in Mexico City that I’m taking advantage of and staying for 2 days by myself. Mind you I spent a good amount of my childhood I. Mexico City. I understand there is danger in Mexico but there is danger everywhere and I am going to be smart and do what I can do stay safe. I am not the only girl in Mexico walking around alone, I’m not special.

My sister told my mom and my mom is freaking out and basically asked someone she knows to chaperone my and not let me do anything. To avoid a fight over the phone and choose pease I said fine even though I know that’s not going to happen. Should I lie to my mom about my plans and just tell her I plan to stay in a hotel and not leave or tell her that I’m not going to listen to her and she needs to let me be an adult. I already know this is going to make her cry and her tell my that I don’t love her and that she failed me as a mom and she’s sorry that I have her as a mother 🙄🙄🙄🙄.

Maybe I’ll just continue lying in order to even have a relationship with my mom

EDIT: My chaperone is an man in his 60’s I’ve never met lol I’m in a relationship with a guy my mom really likes lol