The OP said he arrived on a visitor visa so there could be no "sponsoring" by a brother. Yes, he could have sponsored on a F4 but that's not how he arrived in the US based on the first post.
Oh, sorry, I confused you with another guy I talked with several years back when I was living in Vietnam waiting for my wife's visa. He also lived there and was having issues getting his visa for her.
I can't believe you are having issues with this. You have been physically living with her in Vietnam for how long now? Most people don't live with their petitioner in their home country. A couple of visits, marriage, then go home and file paperwork. Yet they question someone that has lived with their spouse througout the whole process?
Still could file, get I-751 moved up, finish I-751 then withdraw the n-400. Sucks it would cost some money but could get resolution. That said, I suspect the I-751 would come by itself at this late date before the n-400 would come.
I am going to be meeting my girlfriends' parents for the first time when I visit Vietnam again next week. I would like to bring a gift for her mother from the USA. For her father she was able to make a good suggestion for me for a good quality pair of sunglasses for riding motorbike as the quality she can buy for him in Vietnam is not as good. For her mother she has not been able to make a suggestion for a gift. Her father is 72 and her mother is 66 so I would like any ideas of possible gifts for her mother that maybe is something that is only available in the US or is not easily available in Vietnam. Also suggestions that would be age appropriate and also appropriate for meeting for the first time. Gift in the $80-$100 USD range. Any ideas would be most welcome.