Marina also feared being deported and separated from her children. So I believe she had several reasons to tell the Warren Commission whatever they wanted to hear.
She’s one of the least consistent witnesses in this case.
When Marina was giving testimony to the Warren Commission she had no way of knowing what other people knew, saw or were going to say, so I think it was in her best interest to simply tell the truth. I know she may have made some innocent guesses like saying CE139 was Oswald's rifle but to the best of her abilities what she saw of the rifle at Neely Street was a close enough match.
Marina could have said she saw the rifle in the blanket the day/week before but she didn't know what the Commission knew, so she told the truth.
Marina could have said that she saw Oswald carry out the long brown package but again she didn't know, who would say what. Like for instance maybe Frazier would say the bag was already in the car from the night before.
Marina could have said she took X amount of Backyard Photos but she just said the best she remembered, because at the time imo it
wasn't particularly important to her.
There is a potential myriad of possibilities behind every fact and any slight divergence would deeply impact your credibility.
And I believe this same mindset would have been in the minds of the vast majority of eyewitnesses because by the time of the hearings, they were all under intense scrutiny and they would have no idea of the consequences of any contradictions.
JohnM