Lynne is in bed thinking that her and George's German friend Helga has been staying with them. Lynne refers to her as a little tart and remembers that she has been parading around George in sexy underwear. She promptly does the same because she is the only one allowed to do that.
That is one giant pillow. Is it a special pillow that stretches across the entire width of the bed that both she and George share or does George have one on his side too? If this is a normal size double bed then it would seem that George wouldn't have space for an equally large pillow on his side so he may just have a normal size pillow. It may seem unfair that Lynne has a massive pillow and George not, but Lynne may have neck and back problems which mean she needs a special pillow to help her spine.
Helga has been staying with them but we do not know the nature of their friendship. If she feels comfortable enough to walk around their house in only her underwear then it would seem that she is a close enough friend and not just staying for a couple of nights on her travels. Then again, those Europeans do things a little different to the Brits. You would expect that if Lynne had invited her to stay, or at least said yes to her plea, that she would know that Helga was a flirt and a threat to Lynne. Thin carefully next time Lynne.
Now Lynne is parading around in her underwear. Does this mean Helga has left? Did Lynne throw her out? More likely is that she wants to go and check out the sights of Wimbledon before she continues her travels thus leaving Lynne to have George all to herself. George sees the fact that Lynne has come out wearing underwear as some healthy competition that has forced Lynne to up her game. Either that or George was expecting Helga and his next face will be that of a forlorn man who has seen something he's seen 100 times before.