Automate frame height

Hi,
These are my frame properties.

Anchor:
To paragraph

Position:
Horizontal: Right, to paragraph text area
Vertical: Top, to paragraph text area

So, it starts in the top right corner of the paragraph text area. I want it’s height to automatically extend to the bottom of the paragraph text area, but that option doesn’t appear to exist.

Height:
relative to 100% of page area, or paragraph area, but not paragraph text area, which is what I need.

If I tick “keep inside text boundaries” that works, setting the bottom of the frame to the right place, but moves the frame to the next page since it is 100% of page or paragraph area, thus too big for the original page.

I can untick “relative to % of area…” in height which keeps it on the original page, but means I have to manually enter in a number for its height, which defeats the purpose of what I’m trying to do.

Ticking autosize doesn’t help either. If the number is too big it goes to a new page. If the number is too small it doesn’t extend the bottom of the frame to fill the entire paragraph text area.

What I need for height is an option “relative to 100% of paragraph text area” or perhaps an autosize that extends it to the text boundary. Is this possible?