Sif & Phil
"I have heard that we come and go. And that each time everything, and everyone, is a little different. It sounds disconcerting." Sif shook her head. "I grieve for your loss. But I would be glad to spend time with you when I'm in New York on Avengers business. Thor and I have agreed that I should be the liaison for the nonce, and I've arranged my duties in Asgard so I can be available regularly."
Once Loki had completed the new Bifrost, Sif would be able to come and go with more ease. And to visit more easily with her friends.