Whos the one to blame? Can i get introuble?

My friend kate came over to my house because she wanted to hangout with me that night. While there, she asked my twin sister if she could use her ID to get into a bar. (My sister doesnt really care for kate because kate always lies about her age, saying shes 18 when really she's 17). I was confused because i had no idea that we was going to a bar. Anyways, kate asked my sister and my sister is too nice to say no, but hesitated to say yes. She never told kate YES, she just told her "um, you don't look like me" and also told her continously "i don't want you to get caught or anything" but kate kept begging and begging and just snatched it out of my sisters hands, but that rudely. When we left my house, kate and i rode to our friend miranda's house, because kate wanted to hangout with her aswell. We kept kates car there and road with miranda to some guys party. (it was kates friend, she invited us to go and kept begging us to go. it was all her idea) when we go to the party, kate started to drink her alcoholic beverage reallly fast and started to act drunk. She kept gossiping in my ear about other ppl in the house. She even said that miranda was talking **** about me, but i didn't believe it. When we left the party, only kate the one drunk, we were gonna try to go to that bar, but kate seemed to wasted so we just brought her to her car. Like a good friend, i wasnt gonna let her drive drunk, so i drove, while miranda followed. I gave kate her keys and told her to be careful, and to take care of her body and to go to sleep. I hopped in the car with miranda and we went to a local bar. While there, i recieve an unknown caller, i answered it and it was kates mom. She sounded really angry. She said "what is wrong with my daughter? shes drunk! what did you do?" i replied "Ms margy" while calm "i didn't do anything, me, my friend miranda and kate when to kates friends house" i didnt want kates mom to know that she was chugging drinks because im not a snitch and i said "she was just sittin down drinking a few glasses of wine, i wasnt around her because she kept walking around everywhere, i just sat on the couch to chill" Her mom replied "your lieing, you got her drunk and why werent you by her? your suppose to be her friend! And i cant find her cell phone anywhere, where is it?" i said "i have no idea ms margy, ill go look for you" i looked everywhere in mirandas car, and didnt find it. i told kates mom that i didnt find it and she said "you probably stole it, your not a good friend then" and hung up. She called again later and said "i found your sisters id in kates purse and im gonna report it to the police that you gave a minor an id to get into the bar" i replied " we didnt go into a bar, i wouldnt do that. I drove her home because she was really drunk, me and miranda did alot for her. we didnt give her the id, she just snatched it." kates mom said "well im just telling you whats going to happen" and hung up again. Now kates mom continues to text me. She txt me today and said "why did your sister give kate her id when she knows kates not 18" i said "who is this?" because it was an unrecognized number. and the text i got back said "leave me alone" and i said "well, my mom knows everything and if you have a problem, call her" The last text i recieved said "if you keep texting me, there will be problems." WHAT THE **** DID I DO???? plz help.