I felt like Sam was about to tell Addison that he wanted to give her sperm as well.......but then he didn't. He merely picked a donor and said that would be the right choice. BB seems to want Addy for himself, telling Sam he was in it half way, etc. I wonder if he will be the one to turn to when she does get pregnant and Sam decides he doesn't want to deal with it.
I think we will see Amelia's downfall for a couple of episodes which will overshadow Addison's pregnancy or lack there of.