1.) Should there be a comma before "is" in the following sentence below?

She gave birth to her first child by her uncle at age 14 in 1990 is showing a sign of being .

2.) The psychologist help Alesha to break through her issues by using cognitive-behavioral therapy.
Is "to" neccessary or should take it out?

Sentence 1 is not well done. You need to put a period after "1990" and then supply a subject for the verb "is showing."

Sentence 2 is fine, and yes, you can omit "to" if you wish.

So, is sentence 2 either way is correct?

For sentence 1 would this work?

This is showing a sign of being .

If she was 14 when she became pregnant by her uncle, she was . She was below the age of consent and therefore, legally was .

You might say,

She was by her uncle and gave birth to his baby when she was 14.

For sentence 1:

She gave birth to her first child by her uncle at age 14 in 1990, a sign of having been .

For sentence 2:

The psychologist helped Alesha break through her issues by using cognitive-behavioral therapy.

1.) No, there should not be a comma before "is" in the given sentence. The sentence seems to be missing some punctuation, but a comma before "is" would disrupt the cohesion of the sentence. To improve the clarity and structure of the sentence, you could try rephrasing it as follows: "She gave birth to her first child, fathered by her uncle when she was 14 years old in 1990, which indicates she was ."

2.) Yes, the word "to" is necessary in the given sentence. Without it, the sentence would not be grammatically correct. The verb "help" requires the preposition "to" to form the infinitive phrase "to break through," which describes the purpose of the action. Therefore, the correct sentence should be: "The psychologist helped Alesha to break through her issues by using cognitive-behavioral therapy."