Scott Disick is still getting used to his new blended family!<br /><br />In a sneak peek clip for Keeping Up With The Karashians, Scott, 36, his ex and baby mama, Kourtney Kardashian</a>, and his girlfriend, Sofia Richie, were relaxing in a hot tub in Finland.<br /><br />While the ladies were clearly getting along fine, Scott started to feel very uncomfortable watching his ex and new lady, 21, together</a>. The Flip It Like Disick star admitted he wanted to get out and Kourtney, 40, was quick to slam him for being so "negative!"<br /><br />Watch the clip above! Keeping Up With The Karashians airs Sunday nights at 9pm, only on E!.