Mmm..... I wouldn't say I found it uncomfortable - but it is decidedly odd.
I wondered at their last encounter if they were leading into an "issue" - which would be weird after Helen's anorexia.
My other thought was that they are desperately trying to give this (utterly, utterly ridiculous and unbelievable) relationship some sort of theme. Because even the SWs would have to admit it is worthless and an insult to loyal listeners.
Unusually I have no predictions for this story. What is uncomfortable is how stupidly sly and manipulative Kirstie is being made to seem. She obviously dumped Damien in pursuit of Tom and is now trying to seduce him by making him feel sorry for her. 
And she's supposed to be an intelligent and independent woman.
The one interesting Kirsty thing is that she seems to be getting too old and tired to work two jobs. I wonder where they're going with this.