To correct the sentences based on the instruction that they are all false, you would need to provide the opposite information. Here are some suggested corrections:

1. Martina is not two years old in the first picture. (Correct to her actual age)

2. Martina's mom is not at Martina's 30th birthday party. (Correct to the actual event or situation)

3. Martina does not have one sister. (Correct to the actual number of siblings she has)

4. Larry is not wearing a white sweater. (Correct to what he is actually wearing)

You’ll need to fill in the specifics based on the context or details you have from the original post.