Hun taler med sin mor og laver kaffe samtidig.

Because sin is a reflexive possessive. It refers back to the subject of the sentence, here hun.

• Hun taler med sin mor = she is talking to/about her own mother.
• Hun taler med hendes mor would usually mean she is talking with another woman’s mother, not her own.

This is a very common thing English speakers need to get used to in Danish:

• sin / sit / sine = his/her/their own
• hans / hendes / deres = someone else’s

In Danish, tale med nogen is the normal way to say talk to someone or talk with someone.

So Hun taler med sin mor can naturally mean either:

• she is talking to her mother
• she is talking with her mother

English often distinguishes a little between to and with, but Danish med covers the normal idea here.

Useful comparison:

• tale med nogen = talk to/with someone
• tale om noget = talk about something

Yes, very often.

• Hun snakker med sin mor ... sounds natural and common in everyday speech.
• Hun taler med sin mor ... is also correct, but can sound a bit more neutral or slightly more formal depending on context.

Very roughly:

• snakke = chat, talk, speak in a more everyday way
• tale = speak, talk; a bit more standard or formal in some situations

Both are normal Danish words.

Because the same subject, hun, applies to both verbs.

So:

• Hun taler med sin mor og laver kaffe samtidig.

means:

• she talks with her mother
• and she makes coffee

Danish, like English, does not need to repeat the subject when two verbs are joined by og and clearly have the same subject.

Compare English:

• She talks to her mother and makes coffee at the same time.

You also do not repeat she there.

Because they are in the present tense.

For many Danish verbs:

• infinitive: tale, lave
• present tense: taler, laver

So:

• taler = talks / is talking
• laver = makes / is making

Danish usually uses the same present-tense form where English might use either:

• she talks
• she is talking

The context tells you which English translation fits best.

Yes. Lave is a very common verb meaning make or do, and lave kaffe is a normal way to say make coffee.

So laver kaffe is completely natural.

Depending on context, Danish can also use a more specific verb:

• brygge kaffe = brew coffee

But in ordinary conversation, lave kaffe is extremely common and idiomatic.

Because Danish normally does not use an article with a family noun when it comes after a possessive.

So you say:

• min mor = my mother
• sin mor = her own mother
• hans far = his father

Not:

• min en mor
• sin en mor

This is similar to English, where you say my mother, not my a mother.

Samtidig means simultaneously, at the same time.

Here it tells you that the two actions happen at once:

• she is talking with her mother
• while making coffee

In this sentence, samtidig applies to the overall combination of actions, not just the last verb by itself.

Placing it at the end is very natural:

• Hun taler med sin mor og laver kaffe samtidig.

Yes, adverbs in Danish can often move, but some positions sound more natural than others.

The version here is very natural:

• Hun taler med sin mor og laver kaffe samtidig.

You may also see other placements in different contexts, but the sentence-final position is clear and idiomatic when you want to stress that both actions happen at the same time.

So for a learner, this is a very good default pattern to remember.

Yes. This is standard Danish main-clause word order.

Danish is a V2 language, which means the finite verb usually comes in the second position in a main clause.

Here:

• Hun = first element
• taler = finite verb in second position

So:

• Hun taler med sin mor ...

is the normal structure.

This is one of the basic patterns of Danish sentence building.

In careful speech, og is the word for and, but in everyday pronunciation it is often reduced.

In natural speech, it often sounds closer to:

• å

So the sentence may sound more like:

• Hun taler med sin mor å laver kaffe samtidig

This is very common in spoken Danish. Learners often expect a strong pronunciation of og, but native speakers usually say it much more lightly.