<human>: Provide a brief overview of the text.

So my brother is doing volunteer work in PNG.  
  
  
Over the last month he's met and has started getting romantic with a local girl who is also in the same volunteer group. He called our parents a few nights ago and told them about the strange evening he had. I guess she had him over to her parents' house for dinner and afterwards a couple of her cousins showed up and started asking him some random questions like "If her mother needed a bucket of water, would you go get it for her?" and "If her father needed firewood, would you go cut some for him?". Being the nice guy that he is, he answered yes to the questions but thought it was weird that they kept giggling to each other when he answered.  
  
  
My dad is planning a trip out there to see my brother since he's been away from home for about 6 months now. There's some info he needs to get before he can apply for the travel visa, and my brother is now incommunicado (building a school somewhere without electricity) for a few weeks, so Dad called the local church my brother had been visiting to see if they could answer the questions for him. The guy my dad ended up talking to didn't have the best English, but he knew who my brother was right away and he mentioned that he heard they were engaged!  
  
  
My brother was married once before and definitely isn't the sort to propose to someone after just a few weeks. We're wondering if those questions were part of some PNG engagement tradition. We have no way of getting a hold of him for the next few weeks and we're hoping he doesn't accidentally end up married to her without even knowing they were engaged.  
  
  
So, anyone here know enough about PNG to clear this up for us?
<bot>: my brother went to PNG, met a girl and answered some odd questions and now we're worried he may be engaged without knowing it