It means he's been struggling so much as a heterosexual man with women. That his brain has conjured a route inside his head where he has a shot with a woman. Since in general women are more open and more trusting of other women. He probably had bad experiences with women where they were very wary of him. There really is nothing more to it.
Is it just me or they hinted at the king's enemies trying to kill mc and they're the ones behind his family's death?
Nobility? Check
Comedy? Check
Plot? Check
But what i like the most about this is how focused the author is on the psychological state of the FL and her family, without being too dark or too boring.
"I love my son, i fear he might trip and fall if i don't hold his hand"
"So i'll kill him and commit Seppuku"
One of the funniest scenes i've seen in yaoi/bl