Can a man marry his brother's wife's sister?

[mjt]

I am sure this is already here, but I can’t navigate that well.

I am invited to a wedding between a man and his sister in law.

Older brother Smith married older sister Doe

Younger brother Smith now wants to marry younger sister Doe.

Can I attend, or are they considered blood relation?

No other problems in attending, by the way.

Thanks, mjt

 

[Jim_Blackburn]

The older brother’s marriage to the older sister does not present an impediment for the younger siblings to marry each other (cf. Code of Canon Law, 1092) so I see no problem with attending the wedding .