kanozyo ha tomodati to hanasite ite, mou sukosi de syuuden ni maniawanai tokoro datta.

話していて is the て-form of 話している.

• 話している = is talking / was talking
• 話していて = being in the state of talking, and...

Here it connects the first clause to the second clause:

• 彼女は友達と話していて、... = She was talking with a friend, and... or = While she was talking with a friend, ...

So 話していた would simply end the statement she was talking, while 話していて keeps the sentence going and links it to what happened next.

With 話す, と often marks the person you are having a conversation with.

• 友達と話す = talk with a friend

This has a mutual, conversational feeling.

By contrast, 友達に話す often means talk to a friend or tell a friend, which can sound more one-way.

So in this sentence, 友達と話していて naturally means she was talking with a friend.

もう少しで means in a little more time / if things had gone just a little further, and in natural English it often becomes almost.

So:

• もう少しで終電に間に合わないところだった = She almost didn’t make the last train = She was very close to missing the last train

It is a very common pattern in Japanese for expressing a near miss.

Here, ところだった means was just about to... or was on the verge of...

The word ところ literally means something like point or moment, and in grammar it often refers to the stage of an action.

Useful patterns:

• V-るところだ = be just about to do
• V-ているところだ = be in the middle of doing
• V-たところだ = have just done
• V-るところだった = was just about to do

In this sentence, it combines with a negative verb:

• 間に合わないところだった = was just about to not make it in time = almost failed to make it in time

This is a very important nuance.

• 間に合わなかった = didn’t make it in time
• 間に合わないところだった = was on the verge of not making it in time

So the sentence does not say she actually missed the train. It says she almost did.

This pattern is common:

• もう少しで転ぶところだった = I almost fell
• もう少しで忘れるところだった = I almost forgot

So the negative form inside ところだった shows the bad result that nearly happened, but in fact did not happen.

Yes. The sentence strongly implies that she did catch it.

Because:

• 間に合わない = not make it in time
• 間に合わないところだった = almost did not make it in time

So the result was narrowly avoided. She was close to missing the last train, but she made it.

間に合う usually takes に to mark the thing you are in time for.

• 電車に間に合う = be in time for the train
• 会議に間に合う = be in time for the meeting
• 締め切りに間に合う = meet the deadline / be in time for the deadline

So:

• 終電に間に合わない = not make it in time for the last train

The particle に marks the target time/event.

終電 means the last train of the day.

It is short for the final scheduled train, usually late at night. In Japanese, this is a very common word because missing the last train can be a big problem.

So:

• 終電に間に合う = make the last train
• 終電を逃す = miss the last train

は marks 彼女 as the topic: as for her...

So the sentence is presenting information about her:

• 彼女は... = As for her, ... = more naturally, just She...

If you used が, it would sound more like identifying or emphasizing her as the subject, especially in contrast to someone else.

Very roughly:

• 彼女は = talking about her as the topic
• 彼女が = emphasizing that she is the one

In a normal narrative sentence like this, は is very natural.

It can suggest both background and a loose cause.

In this sentence, 話していて mainly gives the situation:

• while she was talking with a friend

But it also naturally suggests that this talking is what led to the near miss:

• because she was busy talking with a friend, she almost missed the last train

The て-form often leaves the relationship a little flexible. It can connect actions by sequence, circumstance, or mild cause depending on context.

Japanese often leaves out details that English makes explicit.

• 友達 by itself just means friend
• depending on context, English may translate it as a friend, her friend, their friend, etc.

So 彼女は友達と話していて literally does not explicitly say her friend. It just says she was talking with a friend. If the context makes it clear whose friend it is, Japanese usually does not need to say more.

Yes. A very common alternative would be:

• 彼女は友達と話していて、もう少しで終電を逃すところだった。

This uses 終電を逃す:

• 終電を逃す = miss the last train

That version and the original are very close in meaning.

The original focuses on not making it in time for the last train:

• 終電に間に合わない

The alternative focuses directly on missing it:

• 終電を逃す

Both are natural.