see thru shirt

It doesnt stop there, she tried on her new panties we got shopping with the bedroom door open and did I mention they were see thru. I cant take her putting a scarf on as a shirt in front of everyone then asking me to take pictures. I noticed while we were all walking thru the mall he walked next to her, her in the middle. I mean I am already upset with what my mom said and that fact that he seems to distant lately. Am I just overreacting. Anyone walking by us in that mall would have without a doubt thought I was the third wheel and they were together. By the time he had done it like 5 times, I was basically fuming. He didnt want to, but I was like "oh just go make her happy". His friend is a girl, who has big boobs and a flat stomach which she loves to show off. I am about to leave to get away from all this. I cant take all this crap. I cant take it anymore. I feel like she is being very disrespectful by doing all this, and I dont think he is helping. I just want to cry.