Avengers: Endgame - 25 WTF Moments

4. Wait, What About Sharon Carter?!

And speaking about Cap messing with the timeline, there's a fairly big, fairly worrying issue we need to discuss at this juncture: incest.

In The Winter Soldier, we're introduced to Agent 13 - Sharon Carter - who sticks around in the MCU for a little while. In fact, she's sort of presented as a new love interest for Cap. You know, keep it in the family and all that. Wink wink... Only... Wait... Hang on...

If Cap marrying Peggy is to be accepted as not changing a reality, then Sharon Carter is in fact Captain America's own grand-niece, which means when the other version of Cap who comes out of the ice unfreezes and literally kisses her, he's kissing his own family member.