Sam2
1.) The possuk of “Vlo Sikrivu” is part of and talking about specific ervos mentioned in the “parsha of arayos”
2.) Touching your wife who is a Nida is a “Harchaka” being Boel her is a Deoraisa.
So again,
If the whole reason why it is ossur to touch a Pnuyah is because she may be a Niddah how could it possibly be more then a Drbonnon (let alone Yiharog Vlo Yaavor) to touch her, if touching a Niddah is only Ossur Drobonon?