The sister is commenting "Yes, Brother Schmudnik, the Bible clearly shows that oral and anal sex, even between married couples, does not please Jehovah". She also happens to be a single virgin who doesn't know what the f@(k she's talking about.
That's why the sister in blue in the back row is smiling since she doesn't want to blow her husband, an elder, who is looking accusingly at the WT conductor as they've secretly blown each other after some steamy judicial committee meeting.
The sister in blue in the middle row is somewhat distraught since she knows her zealous husband isn't going downtown anymore, who happens to be smirking thinking he doesn't have to lick her fishiness anymore.
And Moshe got the single sister's thoughts right, who's going to her BF's so they can practice all that today's WT was about ;)