Last night, we watched Tyler buy a diamond ring to symbolize his commitment to Catelynn. So how does his girlfriend (er, fiance-to-be?) feel about this grand romantic gesture? Sadly, we'll have to wait til Tuesday's Teen Mom finale to see her in-the-moment reaction, but we've got a sneaking suspicion she's gonna say yes. Hear Catelynn tell Teen Mom After Show host SuChin Pak about her relationship with Tyler ("We're best friends," she said, "I don't think anybody could break us down") plus find out why audience members (and SuChin!) agree they're a match made in heaven.