You can't park an I-130 until it gets to NVC. At that point, you can just take no action other than contacting NVC at least once a year to keep the case open. However, that does not solve your issue since it shows strong immigrant intent. Imo, your only possible cure in order to get her a B2 is to withdraw the I-130, and hope a Consulate Officer can be convinced that she, no longer, has immigrant intent. Be aware that all B2 applicants are automatically assumed to have intent to immigrate to the US. They are assumed to have the intent to stay and adjust status inside the US once entering via a B2. Having a US citizen spouse and child are strong ties to the US.