Oh wise e-hellions... I have a doozy

Important background:
1. The Hawk and I currently live in NorthernTown, but own a house in SouthernCity
2. Our dear friends Rien and Mark "house-sit" our house in SouthernCity; they pay utilities but The Hawk and I pay everything else
3. The Hawk and I have our room in our house in SouthernCity - when we travel there, we stay and live with Rien & Mark
4. Rien and Mark are getting married at the end of August
5. I have known Mark longer, but am a bridesmaid for Rien because she has become a very close friend
And on to the tale...
The Hawk and I love NorhternTown, but have eventual plans to move more South, somewhere between NorthernTown and SouthernCity. As such, every now and then we peruse the property listings for the area.
We have a specific list of must-haves, a list of would-likes, and a list of holy-cow-that-would-be-amazings. As it would happen, we found a property that has ALL of what we're looking for, and more. I contacted the agent, and said that if the property was still available in two months (that's the next time we'll be able to get away from NorthernTown long enough to travel that far) we would like to see it. The agent said he would let us know of any offers.
Because Rien & Mark have a wedding coming up, and because they live in the house The Hawk and I currently own, The Hawk decided to let them know what's going on; he sent Mark a detailed email saying we may be looking at a property in a few months, and that IF anything were to happen, it would be after their wedding, but that we wanted to give a heads up. Mark responded with "cool, thanks" and asked about the property. All sounds good, right?
Cue the drama.
I get a text from Rien: "So you're buying a new house. Great. I guess we're moving AND getting married this summer". I replied and explained exactly what was going on. She didn't answer... until I logged onto BookFace later that day. To find Rien's passive-aggressive status about having to spend her tax return on a down payment because "apparently I (Rien) have to worry about moving now too. Thanks a bunch".
*pause for milk & cookies for those reading*
I am furious - I am hurt - I am offended.
Furious because this feels like an attack from one of my closest friends, and that she deliberately is misinterpreting what she was told.
Hurt because she won't even speak to me.
Offended that she is painting me as the kind of person who would sabotage her wedding.
I don't even know where to go from here. Speak with Mark to set things straight? Speak with Rien (and end up tearing her a new one because that's how I react when I'm upset)? Drop out of the wedding? Kick them out of my house?
Am I wrong for not pausing my life because someone else is getting married?
Help
