Standing In Line At US Customs

[SuperSixZero]

My Fiance and I are returning to the USA from Israel to visit my parents. We live in Israel. I hold dual citizenship, she only has Israeli citizenship. She does have 10-year B-1 tourist visa to the USA, that expires in 10 years.

My questions:
Should I stand in line with her?
Should I bring her to the returning US citizen line?
Should I stand with her in the non-citizen line?
If I'm going through customs with her should I announce she is my Fiance? Or just say she is my girlfriend?
Should I pretend not to know her?

What is the best option for an easy experience at boarder control? Since I don't want her to have a bad experience her first time landing to meet my family.

She is returning to Israel after 3 weeks, and I am returning to Israel to finish my degree a month later, ie we both have proof/intent we are returning to Israel. (We already do not have intent to marry on this trip)

What should we do? What should we say?

 

[Triple Citizen]

A1: Your choice
A2: No
A3: Yes, assuming you want to stand with her
A4: If she is your fianc'e then state so, but ONLY if asked about the relationship. Do not volunteer this information.
A5: No, do not pretend to not know her if you are standing together
A6: If both of you are here to visit your family, then act accordingly. No need to hide it.
A7: Do and say what is the truth and nothing else. Answer questions truthfully to the point and do not volunteer any information not asked.

Should I stand in line with her?
Should I bring her to the returning US citizen line?
Should I stand with her in the non-citizen line?
If I'm going through customs with her should I announce she is my Fiance? Or just say she is my girlfriend?
Should I pretend not to know her?

What is the best option for an easy experience at boarder control? Since I don't want her to have a bad experience her first time landing to meet my family.

She is returning to Israel after 3 weeks, and I am returning to Israel to finish my degree a month later, ie we both have proof/intent we are returning to Israel. (We already do not have intent to marry on this trip)

What should we do? What should we say?