Rachylou, 'why now?' indeed. I think Deb has a piece of the answer. I strongly suspect, as she suggested, that this sudden change of heart has something to do with my own aging, my parents' aging, and -- as Liz suggests -- also very likely the confusing sense of loss that accompanies dementia. All the things I liked about my mom are gone, and all the 'bad' stuff will never be put to rest.
I have a complicated relationship with my mother, and while I love her, aspects of her parenting style would probably qualify as emotional abuse. Our young lives were punctuated by my mom occasionally coming completely unhinged and screaming vile things at us. (Actually, more at my brother, because I was such a pleaser; I didn't get in much trouble until I was older). It didn't happen often but when it did, it was terrifying. And my gutless father let her do this. I have vivid memories of her destroying our books or toys in a fit of pique, of smashing cupboards and crockery, and of smearing food in my brother's hair, taunting him and calling him a pathetic crybaby, etc. As a child, I found this devastating, and was afraid of her, yet at the same time craved her approval. Clearly I have issues (which, yes, I have tried to address in counselling).
I also think my experience speaks to what Suz said about how adopted children can suffer the same abuses that natural children do, despite the screening process for adoptive parents.
But my mom experienced a traumatic upbringing herself -- far worse than mine, involving WWII, early abandonment, addicted father, uncertain financial situation etc -- and I could sympathize. And 98% of the time, she tried so hard to do the very best for us. I understood that then, and I understand that now. And now that she's three quarters of the way to la-la land, the person she was -- the good and the bad -- is gone. So it's all very complicated. I don't know exactly how this all affects my sudden desire to find my biological family, but I bet somehow it's a factor. A big factor.
Deb -- btw -- I don't think my children have ever expressed interest in my natural parents. They're still quite young, and they are secure. I wouldn't be finding out for them.
Liz -- wise advice.