US Immigration from Mexico

Asking for a friend (no, really)...

My friend came with a fiancee visa from Mexico, and brought her 2 kids with her. She and her new husband consulted a lawyer, and they believe that, in order to get more money, the lawyer told them that SHE needed to file first, then her kids would do it. So she already has a ssn but she doesn't know if the lawyer filed the kids documents. The thing is that she and her husband are not getting along well, they've been together for 2 years and she insults her and she's a bit afraid of him. I think it's a really toxic relationship, and will not end well. Anyway, my question is what if she takes her kids and gets a job (which he doesn't let her do because he says if she does taxes he will have to pay a lot of money), but what about the kids' documents? Can she keep them here and file to make them residents? I believe she would need to be a citizen first and to do that, she needs to wait for 5 years, but how can she keep the kids here? With a tourist visa and renewing every 6 months?

Thanks a bunch!

I have my tax transcripts for the past 3 years and I need to know what number and specifically the item name I should use for "total income" 24a-24c on the i864. I was self employed overseas from 2016-2018 and I read in other places my income should be 0 because it was earned overseas. I am using a joint sponsor fwiw.

My fiance entered the US sept. 11th, and i later saw the public charge rulings change october 15th. We were marries sept. 20th (certified certificate will be a few weeks) So we are trying to send everything in before that date. (250% above poverty level is ridiculous)

I am making this thread with all my questions.. The list of documents in total i am sending is-

Cover letter

Check for $1975

G1145

--K1

I485 + marriage certificate (not certified, will send certified if rfe appears)

copy of passport and k1 visa

NOA2

I94

Birth certificate

Passport fotos

I693

I864 affidavit of support (i am 198% above poverty guideline)

I765

I131

K2 (4 years old)

I485 + marriage certificate

copy of passport and k2 visa

Birth certificate

Passport fotos

I693

I864 affidavit of aupport

I131

Questions i have:

1. Are these all i need to send?

2. The i485 asks for all children including step children, would i list my children there as we are now married and they are her step children?

3. Do the birth certificates need ro be translated?

4. Will i be sending evidence of the relationship as in the i129f petition?

5. When filling out the forms, can i sign as the interpreter and the preparer? my fiance only speaks spanish and very little english.

6. My fiance needs 3 vaccines according the CDC reccomendations (she has none and is 26). Her son needs 1 vaccine. (he was up to date, just lacks 1 now). What do i send the ds form for vaccines and the i693 vaccine portion, or just i693 vaccine portion?

7. Will there be a cover letter for the EAD and AP documents?

sorry if any questions are dumb questions.