Ela não quer se separar do marido, porque ainda há carinho entre os dois.

Because se separar is the usual pronominal form of the verb when it means to separate / split up / break up.

• separar can mean to separate something:
  Ela separou os documentos. = She separated the documents.
• se separar (de alguém) means to separate from someone, especially in a relationship:
  Ela quer se separar do marido.

So here, se is part of the verb expression, not a direct translation of herself.

Because in Portuguese, de + o normally contracts to do.

Common contractions:

• de + o = do
• de + a = da
• em + o = no
• em + a = na
• a + o = ao

So:

• se separar de o marido → se separar do marido

This kind of contraction is very common and expected in natural Portuguese.

Marido means husband.

It is very common in everyday Brazilian Portuguese.
Esposo also means husband, but it sounds more formal or less common in casual speech.

So in normal conversation, marido is usually the more natural choice.

Here, há means there is / there are in the sense of exists.

So ainda há carinho means something like there is still affection or affection still exists.

This há comes from the verb haver, which is often used impersonally to express existence.

Examples:

• Há um problema. = There is a problem.
• Há muitas pessoas aqui. = There are many people here.

Because this use of haver is impersonal. That means it stays in the third-person singular form, no matter what comes after it.

So you say:

• Há um problema.
• Há dois problemas.
• Há muitas dúvidas.

Even with plural nouns, há does not change in this meaning of there is/are.

In everyday Brazilian Portuguese, many people do use tem with the meaning of there is/there are:

• Ainda tem carinho entre os dois.

That sounds natural in casual speech.
However, há is more standard in writing and a bit more formal or careful in tone.

So:

• há = more standard/formal
• tem = very common in spoken Brazilian Portuguese

Carinho is a warm, emotional word. It can mean:

• affection
• fondness
• tenderness
• caring feeling

In this sentence, it suggests that there is still some emotional bond or tenderness between the two people. It is softer than amor (love) and often less intense.

So ainda há carinho entre os dois suggests that the relationship still has emotional warmth, even if there are problems.

Ainda means still here.

It shows that the affection continues to exist now, possibly despite difficulties or despite the idea of separation.

Compare:

• Há carinho entre os dois. = There is affection between them.
• Ainda há carinho entre os dois. = There is still affection between them.

That still is important because it helps explain why she does not want to separate.

Both are possible, but entre os dois is a little more explicit.

• entre eles = between them
• entre os dois = between the two of them

Using os dois highlights the pair more clearly. It can sound a little more precise or emphatic.

Also, os dois is masculine plural because Portuguese uses the masculine plural form for a mixed-gender pair.

So even though the pair is a woman and a man, os dois is correct.

Because the group includes a man and a woman. In Portuguese, when a group is mixed gender, the usual plural form is masculine:

• one man + one woman → os dois
• two women → as duas
• two men → os dois

So entre os dois is the normal form here.

Yes, that is grammatically correct.

• se separar is the more common order in Brazilian Portuguese.
• separar-se is also correct, but it sounds more formal or more typical of written language, and it can sound a bit more European Portuguese in style.

So in Brazil, não quer se separar is usually the most natural choice.

Because in Brazilian Portuguese, with a verb phrase like querer + infinitive, it is very common to attach the pronoun to the infinitive:

• quer se separar
• vai se lembrar
• pode se sentar

This is the most natural pattern in modern Brazilian Portuguese.

You may also see other placements in more formal grammar or in European Portuguese, but não quer se separar is a very standard Brazilian phrasing.

It can mean either, depending on context.

In relationship language, se separar de alguém often means:

• to split up
• to separate
• to end the relationship
• sometimes to separate legally or move toward divorce

If the speaker wants to be very specific about legal divorce, they might use se divorciar.

So:

• se separar = broader, more common, can be emotional or practical separation
• se divorciar = specifically to get divorced

Because porque as one word is the conjunction meaning because.

Portuguese has several similar-looking forms:

• porque = because
• por que = why / for which reason
• por quê = why, usually at the end of a question
• porquê = the reason, the why

In this sentence, it introduces the reason she does not want to separate, so porque is the correct form.