From what I've seen so far I'm not surprised Chloe's peed off with Saira's attitude... Chloe made it clear she didn't fancy Heavy D, in a nice way, so why shouldn't she kiss Bear if she wants to? Even If she's not single, that's her problem to deal with when she leaves the house.
No-one else was in the garden when she and Bear were first snogging, Heavy D chose to stare at them - he even had to twist round to do so - his choice. Bear's an immature twonk as well, but it was HIM making a point of announcing the kissing to others, not Chloe - yet Saira's now Bears biggest supporter... No wonder Chloe's p***ed off!!
I know she was talking to James about it, but she did tell Saira to her face that she was wrong to blame her for Heavy D taking offence. Fair play, she's not told her she thinks she's a snake though lol.