Just in case you might want to stay in Sunderland rather than head to Newcastle, there are a few massage places that may be of interest:
Malais Thai - in the city centre, not far from the train station. It's a while since I've been but they offer extras. If Yoko is working I'd highly recommend
External Link/Members OnlySparadise - also in the city centre. Not the most discrete but assume that wont bother you if you're not from the area. I havent visited but this is a sister shop to Jasmine Massage (which I have been to) so extras will be on offer
External Link/Members OnlyMei Lan - in the city centre but pretty discrete. Extras on offer
External Link/Members OnlyOthers are a little distance out of the city centre but within a ten minute drive maximum
Jasmines - sister shop to Sparadise, on the north side of the river a short walk over Wearmouth Bridge. Extras definitely on offer but seem to have a tendency to set extra prices high to necessitate haggling
External Link/Members OnlyMagic Touch - on Hylton Road about five minutes drive from City Centre. Extras on offer but seems to have mixed service
External Link/Members OnlyThai Massage in Hendon - extras on offer, five minutes drive from city centre but its a bit of a dodgy area, particularly after dark - though I think they close pretty early
External Link/Members OnlyAnd finally, a couple of parlours that seem to be legit
Thai Orchid - in the city centre Sunniside area
External Link/Members Only
Hua Hin Moon - also on the outskirts of the city centre
External Link/Members OnlyGood luck. Hope you enjoy your time in Sunderland.