This is the unbeaten tournament leaders' fourth successive Six Nations victory - and their 13th of a record-breaking winning run.
Despite worries at home concerning an overhaul of its clubs, Wales next Saturday will be in Cardiff going for its first Grand Slam since 2012, and a first Six Nations crown since 2013.
It was made to work for its 11-18 victory though, with a depleted Scotland side left disappointed not to have made the most of a chaotic second period in which Wales failed to score until the last minute.
Jade Konkel and Sarah Bonar managed two tries for Scotland in the first half but Bethan Lewis' try and Robyn Wilkins' kicking brought Wales level at 10-10 at the half. A rolling maul drew in the Welsh defense, a Russell inside pass to Byron McGuigan put the replacement wing in space, and Hastings sent Graham diving into the right corner.
Prop WP Nel returns from a calf injury, with Simon Berghan named among the replacements as Scotland bid to derail Wales' bid for a Grand Slam in the penultimate round.
SNS England head coach Eddie Jones
He added: "The try we scored was brilliant and great to see Darcy get on the end of it, he worked so hard - I thought he was fantastic today - there were a number of guys who stepped up and put the third best team in the world under incredible amounts of pressure".
"I'll take my hat off to the players in how they've dug deep", said Gatland.
And Scotland started brightly, sourcing quick ball through their half-backs Price and Russell, but they lost a promising attacking position when skipper Stuart McInally was penalised for foul play. "This group have forgotten how to lose and hopefully that continues next week".
Ireland, should they beat France tomorrow, will retain some interest in the championship but with England expected to claim maximum points from two home games, against Italy now and Scotland next week, preventing a Welsh Grand Slam is the realistic goal. This was also Wales' 14th consecutive win.
Close to the half-hour mark, Wales struck their second try in the game with this Jonathan Davies touching down as the teams ended the first half with a 6-15 scoreline.
Scotland meanwhile face the prospect of ending a disappointing campaign with a solitary win unless they can inflict a shock defeat against England in their final fixture.
Tucker Carlson calls women ‘extremely primitive’ in newly surfaced audio
What do you mean in accessory? He is accused of facilitating the marriage between a 16 year old girl and a 27 year old man. In a statement on Sunday night, Carlson said he had been caught "saying something naughty" a decade ago.