Oh, of course!Certainly Christians can incorporate their own spiritual beliefs into a blessingway! That's exactly what I want to enable with my book, helping women of different spiritual paths to find rituals and readings that are meaningful to them ... as well as allow for guests of varied spiritualities to feel comfortable in one event.
For example, I can imagine that you could have a blessingway for yourself in which quotes from the Bible would be interspersed, maybe, with other inspirational sources that would be less Christian-focused, so people like your SIL would feel included and welcome.
It's especially important to focus on the needs of the mama being blessed, because she is, after all, the point of the event. So you wouldn't want to do a heavily-Bible-oriented event for a woman who doesn't self-identify as Christian -- the focus would be on more secular inspirations, but you might also include a gentle Bible verse or mention to help the Christian guests attending feel comfortable, too.
For me, I think it's really important that the ceremonies be both personal and at least have the opportunity of being ecumenical. I think that few of us have entire communities around us with exactly the same beliefs, and even those who do are also connected with people with differing beliefs: maybe our entire family and extended family goes to the same church, but our in-laws follow another path, or our neighbors who we feel especially close to. And because I believe women, especially birthing mamas, need as much support as they can get from a wide variety of sources, I like to create rituals that would make a wide variety of people feel comfortable and enriched.
I'd say the only "requirement" for a woman having a blessingway is a desire to have the support of women in her closest circle, to have one or more physical reminders that she can hold/look at while in labor, and to have the memory of a very specific, very special event that she can draw on when she needs it. It doesn't even have to be written as particularly "spiritual," but as emotionally supportive, instead.
Does that make sense?
Thanks for supporting the vision, and helping keep this thread going!
Oh, and about online blessingways? I've got some ideas about it, but no time to write right now ... but I'll come back to it soon, okay?