Basically in a nutshell:
Steve managed to get to court to testify for Becky. Started saying to judge what a top bird she was etc etc.He is her alibi for when she went nuts and trashed t' steet. (Although he is lying!!)
Deidre's mum (the old bat) turned up to watch/have a nosy in the court room (after over hearing Becky ordering cab to courthouse) and is now black mailing Steve for free drinks at bar. Because he swore under oath/lied to Michelle.
Then Steve realised everything he said to judge he really meant "Sweet girl" etc
and him and Becky shagged in a hotel room (seedy or what!!)
Obviously Michelle knows knowt!!
If it doesn't make sense... ignore...have have a few wines