Hi, I went through infertility treatment 26 yrs ago. Now have 3 children (twins due to fertility treatment). It is a very difficult time. I wouldn't make any rash decisions or judgements. Perhaps you feel your T being infertile now (you mentioned her age) couldn't understand you being as infertile as her but at an age when you really shouldn't? Perhaps it's easy for you to think if her being angry at you, rather then you be angry at yourself/her?

There is hope. It seems impossible but miracles do happen. They did for me.