Hopefully, you will never have to find out, but it's incredibly tough to concentrate when a plump ass is grinding against your face.
Nevertheless, I still did it. I closed my eyes and focused, vaguely noticing Merry making up for my tongue's passiveness by sending a finger to her clit. She rubbed it and made some wet noises with it, but I did my best to ignore all that.
After a few seconds, I could finally see the Qi bubbles. It was one of the longest times I ever needed to connect with the energy since my first attempt. Now that I could see the world in a new light, the sight of the streaming energy swirling from Merry's abdomen to my face became evident.
Her presence did not block Nyssa's abdomen from my senses since it did not rely on sight. It was my first time having sex while being connected to Qi, so it was a novel experience.