認得叔叔 Do You Know Your Uncle Now
行者卻才收了手腳道：「你才認得叔叔麼？我看牛大哥情上，且饒你性命。快將扇子拿來我使使。」羅剎道：「叔叔，有扇，有扇，你出來拿了去。」行者道：「拿扇子我看了出來。」羅剎即叫女童拿一柄芭蕉扇，執在傍邊。行者却才收了手脚道：「你才认得叔叔么？我看牛大哥情上，且饶你性命。快将扇子拿来我使使。」罗刹道：「叔叔，有扇，有扇，你出来拿了去。」行者道：「拿扇子我看了出来。」罗刹即叫女童拿一柄芭蕉扇，执在傍边。
逐句解 Line by line
Only then did Pilgrim draw in his hands and feet. 'So you know your uncle now, do you?'
收了手腳, gathered in hands and feet. 認得叔叔麼 is a taunt built out of the kinship word she has just used under duress, and 得 is the dé of achieving something.
'For the sake of Elder Brother Bull's feelings I will spare your life.'
看…情上 is "in consideration of the feelings of." The sworn brotherhood he argued for through two long scenes and abandoned when it failed is produced again — now as the grounds of a pardon he is granting rather than a favour he is begging.
'Be quick and fetch the fan for me to use.'
將 is the handling word jiāng. The demand is the same nine characters he has been repeating since the door, unaltered by the fact that he is now inside her.
The Rākṣasī said, 'Uncle — there is a fan, there is a fan. Come out and take it.'
有扇，有扇, doubled, in the same shape as her 渴了，渴了 a little earlier. You should hear the eagerness in it. What she is offering, as the next chapter will establish, is not the fan.
Pilgrim said, 'Bring out the fan and let me see it, and I'll come out.'
He asks for proof before he leaves, which is prudent, and it will do him no good at all. 看 is kàn.
The Rākṣasī at once told the maid to bring a banana-leaf fan and hold it there at her side.
一柄芭蕉扇, "one banana-leaf fan" — the measure word 柄 and the indefinite 一 are doing quiet work here, since "the fan" would be a lie. 傍 is bàng, beside. Pilgrim asked to see the fan, and what he is being shown is a fan.
你才認得叔叔麼 — so you know your uncle now, do you. The taunt is built out of the word she used while begging, and it is the exact inversion of the scene at the door, where he claimed a relationship and she refused it in two questions. He has won the argument by a route that has nothing to do with argument.
The pardon is granted 看牛大哥情上, in consideration of Elder Brother Bull's feelings. The sworn brotherhood is back, and it has changed function completely: it was a plea when he needed something, and it is now the grounds on which he is generously declining to kill her.
Her answer — 有扇，有扇, there is a fan, there is a fan — has the same eager doubling as her 渴了，渴了 earlier, and a reader coming to the chapter fresh will hear only relief in it. What she has the maid bring out is 一柄芭蕉扇, a banana-leaf fan, with that indefinite article doing quiet and careful work.
Pilgrim asks to see it before he comes out, which is prudent and useless. He is about to inspect a forgery he has no means of recognising, having never seen the real one except in use.