How to deal with people bringing up stupid things you did as a kid.

So my cousin and her husband came over and initially she started praising me for writing and then she said that I kept lying and making up stories in my childhood as well. So we stayed in a different state and she'd come to visit around 10 years ago.

I told her there were porcupines and she believed it. But apparently my parents said it was not true and not to believe the nonsense i simply keep blabbering. (They are a whole can of worms fr) but the truth is there were porcupines. I remember them. Rn i googled it and there were reports of porcupine attacks in a town less than a mile away from the house we stayed at. It isn't a big deal but idk i feel everything i say seems to be taken like a lie now or im just being paranoid.