Any other time, it most certainly would have been okay.
But for some reason, Madoka dreaded going back up those stairs alone one more time. At least if he had others around, maybe he could gain the courage to say something.
That, and having a wingman wouldn't hurt.
He had a few approaches he could take: cover it up by trying to be sly, ignore it and leave Eriko and Mercy alone and just be a big boy, or tell the truth.
"I-I'll be honest with you two," he began.
Tell the truth it is.
"I'm scared to go back up there by myself, because now I feel like I'm losing Clair and she asked me specifically to go and bring you upstairs for blackjack, and ordinarily there wouldn't be any sort of problem but now I just really want her to like me and she's already upstairs there with Faqir and I probably shouldn't say this but I'm positive they have some kind of sexual relationship and it's really worrying me because I didn't think Clair was that kind of girl, so now I'm worried that he's doing something horrible to her and I really just don't think I should go up there alone because what if she doesn't like me..."
Too much truth, Madoka! Too much truth! WAY too much truth!"
It was too late to take it all back now. Madoka sighed miserably.
"...I-I'm sorry, I'm pathetic, I-I'll just go confront her...alone. Without backup. I-it's okay, I'll be fine. It's not like she'll be mad at me, right? ...R-right?"