～の尻拭いをする clean up after someone's mess
Kenichi: Rachel, are you annoyed with me?
Rachel: No, do I seem like it?
Kenichi: Yeah, a little bit.
Rachel: I'm so sorry. I've been irritable, I guess, but it's got nothing to do with you at all.
Kenichi: What's wrong, then?
Rachel: My troublemaker cousin is at it again.
Kenichi: Oh yeah, you said you've been emailing each other lately.
Rachel: Well, I was cautiously exchanging emails with her because she usually only gets in touch with me when she's in some kind of trouble.
Kenichi: And was that the case this time, too?
Rachel: Yeah. She eloped with a guy who apparently no one in our family likes. He has an Ivy League education and is apparently very successful, but my family thinks he's a jerk.
Kenichi: It sounds like she's counting on you to do something.
Rachel: Per usual, yes. She wants me to help turn our family around and get them to like him.
Kenichi: Is anyone on their side?
Rachel: At the moment it doesn't seem like it. But this is getting old. We basically grew up together, and I've been cleaning up after her messes for decades. I'm living all the way in Japan now and I'm still doing it!
Kobayashi Chikako さんの「英会話 He Said, She Said これって英語で何て言う？」は毎日ウィークリーで毎月第2・4週に掲載中です。