Tunang risau pasal seks life bila kahwin

Hi, M(26) here. Me and my girl dah tunang for a year, dah kenal for 5 years. We are neither conservative nor radical in our relationship. We are open but not too wild. Our dating life was clean, no sx whatsoever. Paling max was sxting, but no n00ds.

Bila dah tunang, things got "berahi". Ye lah, one more step to marriage, to make all of the things we've said during sxting come true (or at least try to). We try our best lah to tahan sampai kahwin, but one night, on facetime, she requested to see my dck. Selama 5 tahun we know each other, the closest she got to feeling my dck is when we hug, and turns out, from what she can feel from it, dia macam been wondering lah, how does it look like. At first I was reluctant, malu-malu cakap eh tunggu kahwin nanti lah, but she begs for it. Before I even pull it out, I am already half hard from her begging. I pull it out, camera pointing down, and my dck sprung out and like flop on my belly.

Then...she "sayang...." then keep quiet, covering her mouth. At the heat of the moment, she made some remarks about the size. I belek-belek lagi for her to see before I cover it back. She was surprised but at the same time macam trying to process it.

Next day she texted me saying that she felt kindda scared about it. To calm her down, I mostly said that we will figure out together, but now she is just worried about it.

For context, I am around 165cm, skinny body. My d*ck is not crazy long, around 6 inches, but I think my girth (around 5 inches circumference) that make her perceive it as big. My tunang is very petite, and shorter than me at 150cm.

So yeah, I don't know what else to tell her other than wait out till our first night. But I feel like she will carry the worry sampai our first night or when we will try to have intimacy for the first time.