If a Chosson & Kallah during the first week they got married attended a Bris, should the assembled recite Sheva Brachos after Bentching?
This is a Machlokes haposkim. This happened at the bris of my youngest son 31 years ago. The Kvaters were a couple during sheva brachos and my Dvar Torah was about this subject in which I proved we do say sheva brachos. However, Rav Moshe Heinemann was present (he was Sandak) and I deferred to him. He paskened we should say "shehasimcha bimono," but not sheva brachos. I asked Rav Moshe Bunim Perutinsky the Halacha and he said I was correct, we do say sheva brachos in that case and he wrote this in Sefer Habris, second edition (I only had the first edition and didn't find it there).
Young Israel of North Belmore's Practices and Procedures for Sheva Bruchos says the meal should be prepared specifically for the bride-groom, and as such would not be recited at a Brit.
no sources in the doc though.
EretzChemda.Org quoting B'mareh Habezek 7 says a Sheva Brachos and Bris may be combined. In the notes he mentions Yechave Da'as 1:90 and B'Tzeil Hachochmo 1:68.
I'm not a rabbi...
My assumption is that the sheva brachot (well, six) should not be recited, because the s'udat mitzvah is not in honor of the chatan and kallah; rather, it is for the mitzvah of milah.
A more interesting question, IMHO, would be, if the parents of the baby boy finally got married after he was born, should they say sheva brachot at the brit. Not a very common occurrence.