A father in the United States reported that the mother of his children has refused to allow him parenting time, claiming "Your house is at risk for contracting coronavirus", and is instead sending his children to her parents' home.

I'm not a lawyer and this is not legal advice.

A father in the United States reported that the mother of his children has refused to allow him parenting time, claiming "Your house is at risk for contracting coronavirus", and is instead sending his children to her parents' home.

The courts will generally enforce their written orders.

Using unfounded accusations to disrupt the parenting time of the other parent is a form of emotional abuse and domestic violence.

Emotional abuse involves invalidating or deflating the victim's sense of self-worth and/or self-esteem. Emotional abuse often takes the form of constant criticism, name-calling, injuring the victim's relationship with his/her children, or interfering with the victim's abilities.

https://family.findlaw.com/domestic-violence/what-is-domestic-violence.html

It is also a form of emotional child abuse which includes:

" allowing children to witness the physical or emotional abuse of another " withholding love, support, or guidance" [from the other parent]

https://www.healthline.com/health/child-neglect-and-psychological-abuse

One possible response to these crimes is to seek a court order holding the other party in contempt of court.