AITA for snapping at my sister?

context if it matters, i'm 17 and my sister is 13 and sorry if it's a bit of a mess, english isn't my first language

Im autistic and i've struggled with social cues for my entire life, and while i consider myself a person that doesn't trust blindly strangers, i do trust my family with my entire heart, which leads me to this problem

my little sister has a very sarcastic humor and she likes saying things that aren't true as a joke and she knows i'll believe her so she does it especially with me. but i don't want to stop fully believing her in case if something serious happens and she tells me.

usually my response is to ask her if she's serious until it looks like i believe her and she tells me the truth, or i stare at her and realize on my on if it's blatantly false but i still believe her for a second. after i realize she lied to me i tell her jokingly that i'll stop believing her and she says i wont because i haven't yet. it still hurts for her to lie to me tho

i think in conversations i have with her, wether alone of with someone else, at least a third of the times she says a similar joke

yesterday we (me, my sister and my mom) about what we'd do in halloween and i asked my sister if she'll spend it here or with her friends (in the sense that where she'd go for trick or treating) my mom said here and my sister said no. i asked her again that in case she hadn't told mom and she said she wouldn't spend it here, so i asked her where she'll spend it and she said here and started to laugh

after that i snapped and told her that it makes me angry and it makes feel like shit for continue believing her, to the point it almost feels like she's making fun of my disability. she got angry with me and then my mom told us both to stop arguing, so she ignored me until she left

i told my mom i felt bad for snapping and she said i wasn't wrong, and she said that my sister is entering her teens so she has been really mean lately (by that she means the last 1-2 years) but that she'll understand

i'm still not sure if i did the right thing because i know my sister doesn't mean it like that and i thought it would be better if i had another opinion

was i wrong for snapping or not?