My husbands mom

Okay so all the sudden my husbands mother is deny N my son as her granchild because she says hes not light hes white and honeslty im fed uo with her talking trash about me already making up pointless lie basically justvto have something to talk about to my husabands father whom she wants to be with but cant because he doesnt want her she calls him and my husbands old enough now where they dont need to co parent so shes calling using me as a topic to start covo with him and then she says to my husband as long as he knows my chikd isnt his then shes okay shell raise him like her own grand child excuse me shes accuse N me of being a hoe comitting adultery and then saying her own grand child is too white to be hers ans that he. Doesnt look like him now remind u theres not another option or person so why shes picking on me idk but i cant deal with her for the rest my life thats for damn sure i dont want to be arpund her at all i only am respecting my husband and havent cussed her out because of him help me figure what i should do was gping to do dna test because i know the truth and cut her out my child and my life when it comes back her granchild she will miss out not me