God this is messy and I love it
Anyone who thinks it's innocent is naive, it doesn't look right because it isn't. Dad makes a new friend at work then whaddya know, she's moving in and taking your kids to school and sleeping in your bed - but she's just sooo nice and lovely she'd never do anything wrong, apart from that one time when they shagged oh and the time after that, and after that, but it was only as friends!
Strictly forces the celebs into a very alien situation where you're so physically close to someone for weeks/months on end, and actually a lot closer than your husband/wife probably has been for a while. And we know what happens, we've seen it so many times. If you're pressed up against someone for 12 hours a day, you're naturally going to develop feelings. Some people won't act on it but some will, and then you have people like Tom who have obviously never been with someone else and it's all very new and exciting.
He's making Gi look like a mug. By all means fancy someone, maybe get a bit too touchy when the cameras are off and you're behind closed doors but leave it there. The constant gushing public posts and and inviting her into the family home for what seems like well over a week... Nah, it's too far. And you know Gi has to go along with it so she doesn't look like the jealous wife, even though something is clearly not right here. She knows it.