“Kreivah L’Arayos might be Yeihareg V’al Ya’avor, but it’s still only a Lav. Shabbos is an Issur Skilah. Shabbos is more Chamur. Kreivah has one Chumra attached because of its status as Abizraihu, not on its own merit. “
Foolish
Yeihareg V’al Ya’avor overrides Shabbos
However, k’reivah (touching) of a single girl is a machlokes whether it is at all Yeihareg V’al Ya’avor