When you discover the MIL wants her son and grandchildren all to herself and does nothing to help the alienated situation!
Then the MIL encourages the second girlfriend to leave so she can have him all to herself!
History then repeats itself and the son ruins relationships with his daughter so HE can have her all to himself.
Not rumours or speculation just plain facts and truth!!
The situation goes on and on, generational collateral damage until someone wakes up and breaks the cycle.
Are you prepared to break the cycle?