She runs a party planning business and she has an assault record.
During Vince's frustrations over planning Dexter's bachelor party, Joey gave him Tammy's number and they soon meet afterwards to plan. Tammy and Vince hit it off while deciding that Dexter would have a party on the sea on the "Party Boat." She gets her girls and organizes everything. After the party Tammy and Vince start dating and Vince even invites her to Dexter and Rita's wedding.