Hi Bill..
Promises are easy to make but can be very hard to keep. You were forced to adapt to the situation and from what you said, I think you made the right decision. Had you kept your mother in your house, your own daughters may have resented you and possibly you would have lost your daughters due to the emotional scaring. At least in one way, your daughters hopefully will remember the good times and the emotional scaring at this early stage will receed.
Hope that is of some comfort.
Declan
Regards
Declan Barry