I know they didn't end up getting married... however I'm still VERY confused as to why Kristina and Molly were at Jason's apartment helping Maxie and Spinelli with their wedding plans. This was when Jason was carrying Sam down the stairs half naked.... which was very amusing!! They have no connection to Maxie and Spinelli.. or am I missing something?!

I agree, I was also trying to figure out the connection, and couldn't figure out how they would even know Maxie or Spinelli....