Re: Marrying your adopted sister !!?!!??
Would you call it weird if two people grew up together in the foster care system ended up marrying each other.
Why do you think it’s weird? The only reason I see, for people not marrying close relatives, is the increased risk of having kids with disabilities. There is no such risk increase in the case you mentioned. The risk goes from 2.5% to 5% when comparing offspring of unrelated couples and first cousin couples. That’s why I say marrying cousins might be considered weirder.