Don't forget that a wide angle lens will give you a wide angle of view and that means it will capture a lot of the background behind your subject, so that means making sure you have a decent, wide backdrop or you accept that you will end up with all sorts of clutter in the photograph. Are you using backdrops or making do with whatever the room itself provides?
In my opinion it really would be better to find more space and shoot from further back, with a longer lens. For example, that first shot I posted above was taken with my girlfriend standing in the bathroom - I actually used the shower curtain as a diffuser for a couple of worklamps suspended over the bath - and I stood on the landing, shooting through the bathroom doorway. Alternatively, maybe you can shoot diagonally across a room, or even step outside the room and shoot through the doorway, as I did. Perhaps you can shoot along the hallway, or maybe in the garage, if you have one. I guess it really all depends on what sort of effect/style you want and whether these are serious portraits for clients or just fun with the family. Personally I'd definitely prefer to shoot with several feet between me and my subject, rather than move in close with a wide angle. I don't want big noses and little ears on my subjects, and I don't want the background looking sharp and drawing attention away from my subject.