へえ、あんたち二人仲良く相合傘で帰ってきたんだ。熱々だねえ。の英語

Eh, you two came back here while sharing the same umbrella. I smell love in the air.

As often happens, their relationship now seems to be better than it was before they quarreled [fell out, had their disagreement].

At last their love (for each other) began to show signs of cooling off.

After that the two who reopened it became lovers.

But, I'm glad that you two came in good spirits.

Their relationship had cooled down to such an extent that they would ignore each other when they met in the street.

And it seems they don't have the slightest intent of coming back so ...

It seems they don't have the slightest intention of restoring it.

They eventually became lovers.

What on earth has estranged [alienated] those two people who loved each other so much?

Trying to come between them [to harm their relationship] is quite unforgivable [is a terrible thing to do].

Tomorrow, if we can go out, we'll see how they are.

As often happens,―As is often the case,―they at last jumped the broomstick.

Two's company, (but) three's none [a crowd].

And because of that, I was guided by two beloved teachers.

The flame of love flared up between them when they met in their hometown after a long separation.

It chanced that we were both traveling on the same train.

Two's company, three's none [a crowd].

The marriage of their children brought peace [reconciliation] between the two feuding families.

That couple finally got back together again [were eventually reconciled].

If the two were found together, it looks ugly―appearances are against them.

Idiot, I've forgotten that two-timing bitch.

Did you see that couple in matching outfits just now? How tasteless!

of a relationship between two persons, being familiar with and able to talk freely with each other

They agreed [arranged] to go to the kabuki together.

Spiteful gossip separated the two old friends.

We didn't hit it off too well at the beginning, but as we got to talking, we found we got along quite well.

Just wait till I get my hands on that two-timing bastard!

They two are capable of anything

They two will stick at nothing.