We have 2 biological boys and we adopted 2 girls this past June. They are biological sisters. We did not ask to adopt a sibling group...it was just God! We said yes to Lilia's referral (18 mos old at the time) and 2 weeks later the agency called and said they had some shocking news. We couldn't imagine what it was. They told us Lilia had a 3 1/2 year old sister, Regina! ...And would we like to adopt her as well? So...that's how we ended up with 4 children.
My husband had a vasectomy several years ago because we knew we were done having biological children. But we had the dream to adopt for years so we knew if we ever wanted more children we would go that route. When our youngest son was almost 4, we decided to pursue this dream. It took almost 2 years to complete it and there was much heartache along the way....but we finally accomplished our goal!
We are happy most days, but we are definitely a bit overwhelmed right now. I think it has more to do with the number of children we have than the fact that they're adopted. I am struggling a bit with my biological ties to the boys being stronger than my adoptive ties to the girls at this point. I plan to see an attachment therapist for myself in the next few weeks. But it has been mostly a positive experience for us.
Good luck!