Don't they, though

[Theseus]

A difficult idiom to describe. Here is an example:-

'Our relationship has reached a state when I care about whether I have let her down or betrayed her, implying that I now care about such nuances. So I say, 'Yes, that's right, I think.' And Martha looks evilly at me and says, 'Yes. They don't half give a good party, Zoe and Caspar.' 'God, don't they, though ...'

It reinforces a preceding positive statement. The glosbe English to Greek translation site gives the long-winded (?(
Πως είναι δυνατό να μην είναι; Is this good Greek?? How would the above statement in bold go naturally into Greek?

 

[Themis†]

Δίκιο έχεις να δυσπιστείς, Θησέα, αυτά δεν είναι καλά ελληνικά. Αν καταλαβαίνω καλά την έκφραση, θα πρότεινα: "Αυτό να λέγεται!". Για τους κάτω των 30 σήμερα ισχύει και το: "Ισχύει!".

 

[Duke_of_Waltham]

«Στ' αλήθεια, όμως», ήταν η πρώτη φράση που μου ήρθε. Δεν μου ακούγεται κακή, αν και δεν ξέρω ποιος θα τη χρησιμοποιούσε.

 

[Theseus]

Thanks, both, for your suggestions. The phrase is not uncommon. It was parodied in a comedy series of the early '90s in the catchphrase 'Dey do do dat dough don't dey dough" ("They do do that though, don't they though"). it means here: "But they do do that, don'tthey."