Her Liverpool side were rank outsiders for the crown heading into Sunday’s final day of the season, needing Chelsea to lose and Birmingham to drop points to stand any chance of glory.
The Reds held up their end of the bargain against Bristol Academy as Natasha Dowie, Lucy Bronze and Williams – from the penalty spot – all struck in the second half.
Liverpool Ladies 3-0 Bristol Academy
FA WSL 1
Sunday 12 October
Select Security Stadium
With the whistle blowing in their match first whilst the other two encounters were still ongoing, Williams and her team-mates faced an anxious wait before news filtered through that Manchester City had beat Chelsea while Notts County had drawn against Brum, confirming them as champions.
"To be honest, it is very difficult to put the feeling into words," said Williams after the dramatic conclusion. "The emotion of waiting after the game, knowing we had done all that we could, is something that I can’t really describe. But once we heard the results, and that we were champions, it was unbelievable."
She continued: "It is ten times better than last season. Last year we were in the driving seat for a lot of the season but this year we have not been on top really.
"To always be out of it and still be in with a chance on the final day says something about the league.
"I always knew that we were capable of winning. The performance in the first half was good but a bit rushed at times.
"Once we got that first goal, we could have gone on and got more than three in the end. I think the staff and the squad’s performance this year has been great."
Having struggled with injuries throughout the campaign, Williams was quick to sing the praises of those youngsters who have stepped up to the breach.
Claudia Walker and Megan Alexander are just two names who have stepped up to the plate, and Williams believes the Reds are well placed to secure a hat-trick of titles next season.
"A lot of young players have had to step in through the season," she added. "The fact that we have stuck together through the different obstacles this season is great.
"I said it last year, and I say it this year, we have a team spirit that you can’t buy. Not to say other teams don’t have it but we have it in abundance.
"I was a little surprised with how dominant we were because every other game against Bristol has been tough.
"Maybe it was because we knew what we had to do and left everything out there."