<human>: Can you give me the gist of the text in a nutshell?

So I understand he is the father of her children. Last night we talked to her about my concern that she was talking to him more and more about not there kids ans she is being more friendly with him. Today she went to the oral surgeon to get a tooth pulled instead of having me come over and take care of her, she asked her ex. Who hung put the whole time and gave her a ride home and she told me that her mom took her home. Worse thing is she is blaming me for be different because i'm "trying to hard which is stressing her out"

Should I be worried? Upset? We are renting a house and have loans together.
<bot>: current gf lied to me about her ex hanging out with her today for a dentist appt and taking her home instead of asking me to.