DOES IT GET EASIER?

I'm an adoptive mom in what was a closed adoption. At age 21 our son found his birth mother. Although she is grateful for the reunion, she has expressed how hard things are for her emotionally again, now that they've connected. My question is: does it get easier? She went 21 years, getting used to having placed her son, then BAM - he's back in her life. I'm concerned for her and would like to know about some of your experiences, please.