TIFU by revealing my tattoos to my strict immigrant parents at my sisters wedding

I’m still debating on what should do. I(22F) am the youngest daughter of four children to African parents who are very anti tattoos (at least ik my mum is).

I got them almost 3 years ago in my first year of uni (5 in total, 4 small and 1 medium). When I got them I strategically got them placed high enough that I could hide them and still wear a short sleeve top in the summer and not raise any suspicions. It’s worked for the last few years and they STILL DONT KNOW.

See, this is where my dilemma comes in. I’m of Congolese descent and my sister is having her traditional wedding this Saturday. I’ve never told them cos; a) I know they’ll cut me off financially and the pocket money I get on top of my part time job as a uni student in London really help, b) my mum is going to freak the fuck out and probably slap me or even berate me and tell me not to let anyone know. Just for preface I love love love them, they make me feel confident and I always wanted to get them.

All of my siblings/cousins know and think they’re pretty cool so I know they have my back. I really thought I would be able to tell them when I graduate or at least don’t need them financially but I’m basically being outed against my will (sort of) as a “bridesmaid” I was given beautiful African material to get tailored into a dress for the occasion. Now I thought to myself, I should probably get a long sleeve dress, but my sisters insisted on me wearing something that’s cute because I’d look like an auntie ( I agree). So I got a pretty dress that shows off my 4 of them, I’m so in love with the dress but as the days progress I’m getting anxious and growing cold feet.

I think I might cover them with makeup but everyone’s I’ve spoken to says don’t. I think I’ll tell them the day before or fuck it and just reveal it on the day as I’m part of the dance routine that’s happening to them alongside my relatives (who I know will have a lot to say) will see for the first time. I don’t know what to do please help.

P.s I’m moving out for my last year of university next week so I won’t have to deal with them too long

EDIT; this is 1 of 2 wedding celebrations she’ll be having. By traditional I mean African traditional which has a dowry and what not. Her all white wedding where she’ll have a proper ceremony will be next year.

EDIT 2: For context: my parents have a very dysfunctional relationship, my mum is a traditional wife in the sense that she’ll agree we what my Dad green lights. I’ll talk to my Dad first and then reveal to my mum. And if I’m being honest I’m not sure on how my Dad views tattoos as he can be a reasonable man at time and isn’t extremely religious imo however my Mum is a devout Christian woman who even saw my piercings as bad and would probably have the more drastic reaction.

EDIT 3; Okay, I’ve just got back from a long shift, I’m tired af. Just to make it clear I will NOT be revealing it to them on the day. In fact I actually had a hard conversation with my Dad today. A lot of tears and my Sister that’s getting married said she’s proud of me. Showing them on the day wasn’t my initial plan it was actually suggested to me by my sister. So that one parent down. I’ll make an update post. thank everyone for taking the time to respond it really helped even the not so nice ones

TL;DR: I’m going to reveal my tattoos to my strict Christian parents at my sister’s traditional wedding and need advice.