Actually USCIS pretty much has blessed your VWP "loophole"

> "INA section 245(c)(4) renders aliens admitted under the VWP ineligible to adjust status to that of a person admitted for permanent residence. This provision, however, includes an exception for immediate relatives of U.S. citizens. Thus, an individual admitted under the VWP who is also an immediate relative is not precluded from seeking adjustment of status, even after the VWP period has expired."[1]

https://www.uscis.gov/sites/default/files/document/memos/201...