A traditional Catholic author, Rev. Herman Bernard Kramer in his "Book of Destiny", impramatur, available from TAN Books, would agree with you. "The woman in Chapter XII is not the Blessed Virgin Mary. The ancient interpreters beginning with Hippolytus and Methodius understood this to a figure of the Church."
There's a lot more, and it's very interesting, whether you buy into it or not, and it was originally published in 1956, before Vatican II. I think both catholics and protestants who are interested in the Book of Revelation would benefit from thoughtful reading of the book, whether they agree with it all, or any of it, or not.
Nevertheless, I know how bigoted some protestant sects are to the point they won't pray with catholics in their prayer groups. Denying a catholic family an equal chance at a child is just plain bigotry, although I suppose they have a right to do what they want.
I think, despite differences, people should work on finding common ground and exercise true Christian charity towards one another. Bigotry and/or arrogance on either side raises red flags with me and turns me off.
I've never heard of prayer groups not accepting Catholics, at least not in our area.