I cannot recall if you said or have described her previous calls. If they are typically non important, then you prob should miss a few calls. If she has the kids and calls by all means answer. I get what you are saying about not wanting to be "inconsiderate" but you do not want to always be available to her either. Remember, people want what they cannot have. She has to miss you and realize her actions have made you no longer her fall back safe bet. She is going to have to WANT to have you back. Just being available and taking her back now that her plan A failed is not going to get you the respect your relationship would need to survive.
Just my thoughts...
Me: 42 W: 32 Married 7 years together 8.5 S1: 7 S2:7 Bomb #1: 09-16-13 Recon #1: 11/13 A discovered 04-03-2014 W filed D 05-19-14 but never served me I filed D 12-02-2014 S 05-31-14 Divorced 5-19-16