The reality TV contestant claimed that the couple's happy homelife is the reason behind the England striker's recent glut of goals for England and Tottenham.
"I'd like to think that I have something to do with his recent run of form," Thomas told the Daily Star. "We spend a lot of time at home rather than going clubbing. We just relax and watch TV. I've got him addicted to Crimewatch.
"I'm taking good care of him and I think that half the battle is being happy, which he is at the moment.
"Some of his other girlfriends have always wanted him to go out partying, whereas I will tell him to stay home and save his energy if a big game is coming up. I'll cook him a nice meal and we'll sit back and watch the telly. He loves my cooking."
She added: "I'll sit there with a hot chocolate while he's working out and tell him to do one more set or run a bit faster. He even practises his tackling on me in the garden!"
Defoe's previous girlfriends include Celebrity Big Brother duo Chantelle Houghton and Danielle Lloyd and 23-year-old Charlotte Mears.