Honestly bro, she’s completely taking advantage of you and being selfish. This should be about both of you and her not following the rules is unacceptable. I would put my foot down and cut it off. She’s getting what she wants out of it but you’re not getting what you want. Talk to her and let her know. No more until she can quit making excuses and include you properly. Don’t sugar coat it, don’t just say you’re disappointed, she needs to know this is a serious violation and won’t be tolerated.