Actually, first of all congratulations on successfully cheating your girlfriend! Heartiest congratulations! Are you guys into a serious relationship or is it just a 'friends with benefits' relationship? Tell me something, how would you feel if your girlfriend comes and tells you tomorrow that because you're not able to satisfy her, she has gotten laid with another boy and with her uncle of hers who has a crazy sex drive?
Not good right! When would you realize that it is not just sex which is there in a relationship, there has to be love, care, mutual understanding and everything?
Isn't sex twice a week enough for you? And that too four times a day! I wonder would I be able to sustain so much whenever I get laid, though I agree that everyone has a different way of thinking and behaving!
By the way, I genuinely suggest you to break off with your second girlfriend and be loyal to the first one!
And speaking about your aunt. Well, if at all your uncle comes to know about this affair of yours, he will shoot you with his armour! I know what army men are ! Many of my uncles are decorated officers in the armed forces! They are jolly but equally ferocious when it comes to the business!
Dude, don't spoil your aunt's married life! She is married and has a healthy life! If at all she approaches to you, tell her politely that you are now interested in shaping your career and that you don't want any distraction, so you want to keep away from her! Still if she is insisting, ignore her. Your ignorance would speak for itself!
This what I feel you should do. And yes, be loyal to your girlfriend! Learn what is meant by loyalty!
Take care, god bless you!