She’s not his new partner, I believe she’s married, I’m pretty sure it was her wedding they went to the year Hallie was born.. Blake was a page and I think Dean was also part of the wedding partyLooks like dean is dating someone he already knew from the past too? Said on his latest story she’s been there for him “through hell” over the years how strange for them both to default back to people they’ve already been with/already know.