Thank you. I was hoping for an alternative for "zu weit gehen" - does anybody have an alternate suggestion, maybe?

Um... You've crossed the line. I can't think of any others offhand.

We don't have this arch metaphor. If you gave us more than one sentence it might be possible to come up with a similiar metaphor that fits, though.

I thought of "Now that's pushing it (a little)"

the straw that breaks the camel's back

keine ahnung wie man das schoen in einen 'du' satz einbringt...

"Crossing the line" sounds a tad too definite according to my feel for language; however, maybe I'm wrong. You can also merely "den Bogen ein bisschen überspannen". "Slightly crossing the line" seems a bit weird though, again, I may well be wrong. On the other hand, "going a bit too far" is probably okay indeed. Well, maybe I'll stick with "going too far" after all.

Then again, translating "Er warnte sie davor, den Bogen nicht zu überspannen" with "He warned her not to cross the line" rather reminds me of a building site than of a metaphoric phrase.

As for "Now that's pushing it (a little)": Would it sound reasonable to say that "Someone's pushing it" (instead of a deed)? E. g. "Now you're pushing it a little" or "He warned her not to push it [ too far ]"?

Thanks again for your help.

I have heard this expression, when someone's indicating that someone else has gone too far

@wpr: I'm not 100% certain, but I think the metaphor is over-drawing a bow (as in archery, Robin Hood etc.). Muttersprachler?

I often use the line metaphor to indicate how far someone has pushed it...

There's this line... and you are currently standing on it and ready to cross it. Don't take another step.
or
You're close to crossing the line.

From aircraft testing originates the phrase "to push the envelope" which seeped into conversational language as "stepping over the limit."

Anne: you're absolutely right.

All: Thanks again, I think I know where I'm heading now.

I looked it up in a dictionary so I think it should be right.

and that took you the whole year? ;-)

btw: Anne is not absolutely right.

Wäre das auch möglich?