She may say that but inside she knows it's hurting them and she more than likely does feel terrible about it. But yes she will say things like that to try and make it seem like everything is OK.
My W didn't care when shouting abuse at me in front of kids, she didn't care when she told them we are not a family, she didn't care about taking them out of their home where they have lived since they were born etc. If she cared about them then she would be willing to talk about our relationship and get counselling etc. to see if we could provide them with what they deserve.
My W never really did any of those things. Our son is really small so she really couldn't tell him things like that. We are also sharing custody. But my W was like yours, completely unwilling to attempt counselling although she has stated to me she is seeing a councilor herself...not sure if I can believe it or not.
W 31(WW) Me 32 Married 7 years together 12 1 kid - 1.5 yr old S BD 23/05/2018 Separated since BD I moved out 20/06/2018 for my own sanity OM or just fling? Not sure...