Khloe Kardashian and Tristan Thompson's bond is better than ever.

The adorable duo, who started dating in September, is still together and getting much more serious, a source close to the couple told ET on Monday.

WATCH: Khloe Kardashian Shares Sultry Bikini Snap and Hits Gym Twice in One Day

"Khloe and Tristan are amazing," the source revealed. "Khloe is madly, madly in love with this man. She is the happiest she has been in a really long time."

According to the source, Kardashian has "never been in a better place."

"She feels really strong about this relationship and sees a future with Tristan," the source added. "He adores her."

The NBA pro welcomed a son with his ex, Jordan Craig, last month. Since then, Kardashian has been nothing but supportive of her beau.

"Tristan is very honest with Khloe," the source told ET. "Khloe knew he was expecting a child with his ex when Tristan knew. It wasn't a surprise or a bombshell, wasn't something they had to work on. Khloe is fully supporting Tristan being a dad."

WATCH: Khloe Kardashian Documents Her Wine Night With Tristan Thompson

Earlier this month, Kardashian, 32, and Thompson, 25, enjoyed a dinner date night. Naturally, the reality star took to Snapchat to document their outing, which included a lot of wine.

See pics in the video below!

- Reporting by Jennifer Peros