Incest (potential or otherwise) is a near-taboo subject on soap operas today...
...but the then-brand new genre of romance comics took several cracks at it back in the 1940s.
Note: this never-reprinted tale from Timely Comics' Actual Romances #1 (1949) makes the brother and sister step-siblings, just to be safe.
Though the Grand Comics Database lists Mike Sekowsky as the artist, it looks a lot like a combination of Werner Roth and Bill Everett, both of whom were working for Timely.
The writer is unknown.
Next week:
We haven't decided yet what it'll be, but we can guarantee that...
You'll Cry Your Eyes Out if You Miss It!
(Oh, you've heard that, eh?)
And now a word from out sponsor...