I think Egor cares a lot about Kami,but is afraid of commitment.Especially,since he has already been through a failed marriage.Personally,I don't think he will ever find anyone better than Kami.
I thought the first guy from her hometown that she dumped after one night seemed to be a nice guy who really cared about her.Maybe she needs to give him another look.
Maybe the party was for the purpose of cheering up the pregnant girl.Could it be that Kami asked Egor to leave so that they could have the party for her?