TIFU by trying to give my gf advice on wiping after shitting

So this literally just happened to me and im hiding in the bathroom not knowing what to do. So a little background, this morning my gf and I took a shower, standard shit, we are both very hygienic so I’m not at all worried that this is a common occurrence or anything like that. However after the shower she did go out with her sister for a bit, so I assume it was then that she shit.

Again whatever I do not care, but when she came back, things started heating up and we ended up having sex, i should mention we’re both girls and I had on a strap. Anyways we’re in doggy position, and I notice something on her thong, it’s a brown stain, so I immediately think that it was from her period or an old stain, whatever I don’t care, the vibes are still going strong and I didn’t say nothing. As we’re fucking though, she goes to move the thong, and I see that there’s still some poop residue in her asshole. I put the thong back where it was and continued having sex with her. After we finished we ate but I felt like I had to say something. This is where I fucked up. I’m a huge advocate for people using wipes after they shit, I feel like it’s more hygienic and gets all of the shit gone than toilet paper. And recently I learned a trick through Reddit that you put the wipe over your finger, like a tent, and move it around in your hole very slowly and obviously not too deep, do it once or twice and boom you’re clean.

So I figured why not share this advice with her instead of telling her what I saw. Well I showed her the tent method it backfired, she immediately thought I showed it to her bc of her. I tried saying no and that it was for me and that I like it and thought she might, she didn’t believe me. Now she thinks she’s disgusting and she’s upset, and I genuinely don’t know what to do.

I’m not grossed out at all, shit like this happens
and honestly if it was me I’d want her to tell me. But now I’m hiding and I don’t know what to say to make her feel better.

TL; DR: girlfriend had poop residue in her asshole, I noticed it during sex, then like the idiot I am, decided to show her how to put the wipe on her finger like a tent and wipe, she then got upset and thinks she’s disgusting and now I’m hiding.