Instagram picture sends fans into a frenzy of speculation.
The couple are currently enjoying a post-season romantic holiday in Portugal, with Conor's Ireland teammates.
They've been posting lots of adorable holiday pictures, but the one below attracted particular attention.
Eagle eyed fans spotted a ring on the Derry model's significant finger.
Source: Instagram (@joannacoops)
Responding to the rumours, Joanna posted a picture of the ring in question on her story, which shows shows that the ring goes across three fingers.
'Lads, it's a snake', she added.
