Immoral as it might be, perhaps you could use this to your advantage.

'Wait.' You think. 'If mom is drunk... Well, perhaps I could... You know, get her to do something she otherwise wouldn't be willing to do.''

'...'' You watch as her breast bounce as she speaks. You swallow, hard. You have been avoiding her for this very same reason... You are attracted to her, and her natural charms make it very hard for you to hold back your lust. You live a rather hedonistic life, even taking advantage of the woman who gave birth to you isn't above you if it means the outcome will bring you pleasure.

''Mom...'' You say, voice low.

She looks at you, '''What is it, Edmund?'' She asks, her tone curious.

''You still have plenty of wine left on that bottle .'' You point out. Yeah... You were doing this, even if it was immoral. Operation 'Get Mom drunk' has oficially begun. ''You don't want the drinks to get cold, right?''

''That's true...'' Katherine agrees. You know she's a little tipsy already, so as long as you aren't too agressive or stupidly obvious, you should be able to pull it off.

''Well then, shall I get you another glass?'' You suggest.

Katherine giggles, ''You really are a good boy, Edmund.''

''I am, aren't I?'' You say. ''Just don't tell father. You know he doesn't like when you drink.''

''That bastard can go fuck h-himself!'' Your mother growls, her hand slapping the table as the wine bottle trembles from the **** of the hit. ''I'll... I'll drink as much as I want!'' You lead her to one of the side tables, away from the maids and butlers dancing, there you pour her another glass of wine. You offer it to her, she takes a sip and smiles at you.

''T-Thanks...'' Your mother replies, her words ever so slightly slurred. ''Y-You do get me, E-Edmund. Not like that bastard, Edmund... I mean, Edmund the King, not... Not the Prince...''

''I see you have been enjoying yourself tonight'' You chuckle. ''You seem to have managed to drink a fair bit before I got here.''

''I h-have been having fun, yesss.'' Your mother replies casually. ''As I s-should, I am the Queen!''

''Indeed you are, mother.'' You say, watching as she takes another sip. ''I wouldn't want to spoil your enjoyment.''

Katherine looks at you warmly a dumb smile on her face, '''I h-have no complaints ssssso far.'' She sips again. ''I'm f-feeling pleassssantly relaxed.''

''That's good.'' You nod. ''I hope you enjoy the rest of your evening.''

Katherine giggles, '''I don't t-think I can.' She chuckles. ''I think I m-might need to retire early.''

Retire early? No, no, no. You need to get her drunk. You need to convince her to keep drinking. But how...? You pause, smiling mischievously. Of course, you should use the same method your sister did. You should aim at her fragile ego. Your entire family, you included, are quite a prideful bunch, and your mother is no exception. You need to make fun of her being a lightweight.