Phoebe: Oh my god, Frank, are you thinking of leaving? Because I didn’t have those triplets so you

could just run out on them!

Frank Jr.: Oh, no! I would never do that. No. I just was thinking that, you know, maybe you could take one.

Explanation:

run out on somebody   phrasal verb  to leave someone when they are in a difficult situation –

used to show disapproval :

He ran out on her when she became pregnant.

وقتی باردار شد، اونو ترک کرد.