The pair look like becoming the first Big Brother romance of the series, but Ashleigh is unsure whether her feelings are reciprocated.
Ashleigh revealed in the Diary Room: "I want to tell you about Luke, I really like him. Sometimes I think he's awkward, he's very blunt, then on the other hand he's really kind and nice, it's a bit weird.
"I just like his muscles, I think that's why I like him, don't think it's his personality, we'll see what happens."
In a conversation with Chris James later, she added: "I like Luke a little bit, but I know other people like him… I think Lauren.
"I think he likes Lauren... so that's why I'm going to stay away, I don't want to get involved."
After hugging in the kitchen, Luke S told Ashleigh that he wanted to "smash [her] back doors in". An embarrassed Ashleigh told the nightclub promoter that he must be "sexually frustrated".
Big Brother continues tonight (June 11) at 10pm on Channel 5.