Originally Posted by BlackKat
I think because Margaret agreed to it it's okay for Sonia to see her. It's just that Sonia has no legal right to see her. As Martin is Rebecca's legal guardian now (although was that ever finalised?) it's now Martin's decision if Sonia sees Rebecca. I think whether you can tell the child he/she's adopted comes down to the discretion of the legal guardian -- previously Neil and Sue, then Margaret and now Martin.
I don't think they should tell her yet. It's a difficult situation though -- when she is old enough to understand they'll have been lying to her for years. But until she's old enough to understand it'll do more harm then good.