The Byrne story mentioned before, where Sub-Mariner flirts with Sue Richards, in a crossover story, is in ALPHA FLIGHT 3 (Oct 1983).
Then FANTASTIC FOUR 260, and concluded in ALPHA FLIGHT 4 (both cover-dated Nov 1983), in a period where Byrne was still doing good work.
It's up to the reader to interpret how much cuckolding might have occurred off-screen in these issues.
https://readcomiconline.li/Comic/Alpha-Flight-1983/Issue-3?id=34037https://readcomiconline.li/Comic/Fantastic-Four-1961/Issue-260?id=26961https://readcomiconline.li/Comic/Alpha-Flight-1983/Issue-4?id=34059![[Linked Image from storage.googleapis.com]](https://storage.googleapis.com/hipcomic/p/46ad5935e1392404d94c0526e0e6caed-800.jpg)
