Hmmm ... I don't feel any real spark with Mahiro and and Benitora, but they like each other a lot ... .

Goku can tell when Sanzo is in trouble, you know. Remember when he and Hakkai were "inside" Kingaku's magic gourd, and outside, Sanzo had been knocked off the cliff?

But yeah, Sanzo will start to feel it. Goku's also trying to hide his feelings more - he realizes that he's making Hakkai and Gojyo worry. Yes, he's doing some growing. (LOL, he should end up with Lirin when she grows up ... she'd keep him busy ... .)