I went to Angela and Diego's wedding in Rivet City. After everyone had arrived, I went out into the hallway and chucked a few Nuka Grenades into the church. Try it. It's way fun.
I went to Angela and Diego's wedding, waited patiently for the ceremony to end, followed the couple out into the hall and to their new room... and then proceeded to knock Angela out and enslave her new husband.
Oh yeah, then I came back and seduced her... :hubbahubba:
She never did recover her memory from that day... but I did later find out that Diego had been killed while trying to escape the slave pens and get back to Rivet City.