AIO after my friend lied to her parents and told them she was with me?

We are both 19(F), for a bit of context my friend has a helicopter mother. We are almost 20 and she makes it a real issue if my friend wants to sleep out of the house. a few years ago she didn’t even let us but we have 7 years of friendship and she finally trust me. Thing is my friend has a boyfriend, he is fairly new so her mother doesn’t know him yet. Sometimes we go out and since we come back late she just sleeps over cause she lives a bit far.

Into the situation, i’ve been seeing her going out with others friends and staying past 1 am so she does sleeps in other places which is completely fine. When i saw that in my mind it was like “well finally her mom calmed down” in the past she has tried to sleep in my house when she got out but that made me uncomfortable cause i felt like i was being used by my house(don’t know if that makes sense) she told me she was sleeping at her boyfriend house and i was like ??? her mom evolved. We were talking about how it went and i was amazed so i asked her if her mom didn’t make a fuss and she goes on that she actually lied to her and told her she was with me.

I was furious, not only i was mad because if she got caught even if she did sleep at my house her mom wouldn’t let her go out and if something happened to her i was in that mess too. But i don’t know i felt used i think is the right word? it pissed me of how she didn’t think to ask me if she could say that, not only that but all the other times she slept out of she house she as also telling her mother she was with me. And i don’t know i flipped out told her that was not okay and she kept telling me that she forgot to tell me.

This is not new, one time her mother called me at 12 Am to ask me where my friend was and i was super ? cause i thought she was at her (ex)boyfriend house just for my friend to call me later and tell her she was with me.

it think it’s a bad situation but i think i handled very badly, like i said, i flipped out, i dragged the issue and the fight for like 2 days, i got tired and just sent an okay and she responded but i left her on seen. Now i feel like shit, i know it was bad but i feel like i’m overreacting about a minor issue. I know it is i just feel disrespected i guess. Now i don’t know if apologize for dragging it cause i honestly feel bad.