Mothers wrong dad
Welcome to this "Community.FamilySearch" Forum.
I am just another 'lowly' Users/Patrons ...
For starters ...
To "Change" (ie. Correct) either, a "Parent-Child" Relationship; and/or, a "Couple" Relationship ...
Here are a couple of "Knowledge Articles" in 'FamilySearch':
How do I correct parent-child relationships in Family Tree?
A person in Family Tree has the wrong spouse
Go through those "Knowledge Articles"; and, follow the 'Steps'.
IF, you still need a 'hand'; THEN, come back here to this post of yours.
There are many willing to help/assist.
That is what this "Community.FamilySearch" Forum was originally established for ...
Users / Patrons, HELPING / ASSISTING, Users/Patrons.
And, has been operating quite successfully that way for many Years.
I hope this helps.