Oh god. I am so sorry that you having been raped has seemingly changed their feelings towards you! Ow ow ow. Just when you need the reconnection and healing of consensual loving sex, they can't or won't provide it?
That just seems very cold and unfeeling and uncompassionate of them. If my gf was ever raped, and expressed desire for me afterwards, I would be more than happy to provide the loving yumminess!
How long have you known this couple? It sounds like you are seeing a side of them that is none too pleasant. My sympathies and heart goes out to you.
Are you pressing charges against your rapist? What is the attitude of your bff who is his mother??
Love withers under constraint; its very essence is liberty. It is compatible neither with envy, jealousy or fear. It is there most pure, perfect and unlimited when its votaries live in confidence, equality and unreserve.
~Percy Byshe Shelley