My DD and I aren't in reunion yet, but I would probably sign "Love, Roni" until she decided on what she wants to refer to me as. I don't want to cross any lines with her or her a-mom.
So, talk to her about it. Tell her how you would like for her to sign her emails. Maybe she is not wanting to cross any lines either. She might be a little relieved in knowing it doesn't have to be "Bio-Mom".
