True. Though, in some countries it is possible to sue for some of the money back if you are found to not be the parent. Trevor can't be her father since the dates of Shannon getting pregnant and meeting Trevor don't match up, but if he adopted her as his, he would be on the hook for child support. If Trevor paid support for Becca, Shannon admitting she is someone else's child (and married to him) could have serious financial issues for her, and again, massive narcissist Shannon can't allow to give up power.