It used to recieved wisdom that it was pretty much always the man who would reject a woman's existing children if he remarried
Today, from the threads here, it's the women who absolutely viscerally hate their DPs or DHs children from a previous relationship.
From not taking them out with 'their birth DCs' (i.e leaving them behind), through not wanting to provide any care for them at their 'too frequent' access visits, and not wanting DH to spend to spend time with them, to hysteria that they must 'not be entitled to any of MY money when I die because their real mum will provde'...
Is it because you think the mother of the kids has some hold over you DH/P?
Is it because you would rather neither you nor your oh had any remider of his past life?
Many male animals kill the offspring of the previous male they have conquered.
Here, it seems like many of you would be happy if your DSC didn't exist!