Girlfriends 2 middle children play on everything to get there own way
just wanting some feed back from mums and dads, my girlfriend and I have been dating for a good 14 months now her kids know me as a friend to there mum and I'm around a lot. Her eldest is 13 and has warmed to me suggesting that me and his mum hook up lol( if only they knew lol). The youngest who is 4 also socialises with me a lot and I interact with him massively(father is a when it suits person). Now on to the middle 2 . My gf took her kids away 2 weeks ago and tried to ease them into letting them know what was going on and that she had met somebody but when she asked if they were ok with it the 2 middle ones got emotional about the situation, saying they didn't want her to be with anyone and so forth. Then a few nights back we were at her mums and she had decided to cancel her night out the following night but when I looked at the 2 middle ones they had such a conniving smile on there face it was shocking as these 2 parade around like they're hard done by, it's the first time I've seen this Behavior in them and it's starting to explain a lot when we have had plans and she's cancelled at the zero hour once costing me £400 for a weekend away.
long and short of it how do I approach my gf and let her know what I'm seeing without her feeling I'm getting on at the kids?