^^Yes they shared a bed for 4 years.
But It's true, we will never know for sure, unfortunately we don't get the benefit of DNA evidence such as the controversy with Thomas Jefferson and Sally...whatshername.
While we're mulling it over, we can ponder this poem that Lincoln wrote
when he was twenty, about a boy marrying a boy:
I will tell you a Joke about Jewel and Mary
It is neither a Joke nor a Story
For Rubin and Charles has married two girls
But Billy has married a boy
The girlies he had tried on every Side
But none could he get to agree
All was in vain he went home again
And since that is married to Natty
So Billy and Natty agreed very well
And mama's well pleased at the match
The egg it is laid but Natty's afraid
The Shell is So Soft that it never will hatch
But Betsy she said you Cursed bald head
My Suitor you never Can be
Beside your low crotch proclaims you a botch
And that never Can serve for me