ITA with everything you said. Regarding June, at first I thought "Marriage? No, no, no way too soon!" However, they have a much better chance of making it than June and her former SO Sadi. June's voiceovers would say that Sadi had become her caretaker, a definite romance killer. From her original episode one could see how dead Sadi's eyes were and, like someone said during the Live Chat, she seemed so over it.
June and Mary have the advantage in that Mary never had to deal with that type of burden; she got the benefit of meeting and falling in love with an independent, self-sufficient woman.