What a FANTASTIC situation to be in!?!
I truly envy you.
Before I share my 2 cents worth on the actual point you raised, I wanted to comment on 2 other things.
1. You mentioned Maya is Bengali, short and with mid-chest length hair. Immediately, I had images of one of my idols, who is exactly all that, in my head - Riya Sen. If Maya looks anything like Riya, she's definitely a keeper!
2. You have been very liberal and forthcoming in sharing your exploits with Maya. One aspect that you mentioned in passing REALLY hit a spot. Apart from erotic hair, I have another fetish. Squirting. Never been with someone who did, super aroused by it, and seriously hope to experience this one day. Some questions, if you don't mind sharing:
- Does it "always" happen, ie each time you make love with her? Or not every time? Is it "seasonal"?
- When does it happen? I mean, during penile penetration? Oral sex? Fingering? All of the above?
- How does it taste? The same as her "regular" wetness?
- How "long" does she squirt for?
- Have you ever shared her squirt juice with her? Does she willingly "take" it?
Sorry to all those who are here purely for hair related chatter for going astray with the above.
On to the matter on hand. What to do with Rekha.
I think my "advise" depends on 2 considerations:
1. Do you love Maya? If yes, then tread very carefully - if you want to pursue Rekha but keep Maya, it obviously has to be with the consent of all 4 people involved (Rekha's husband being the fourth). I will not comment on the husband (since that angle is somewhat covered with Point 2 below). Rekha, with her incessant flirting, is clearly up for it (that too knowing it is her sister and potential future brother-in-law involved, etc) and has no qualms to do the deed with you (more on this below). So that leaves us with Maya. Has she ever given any indication that she would be ok with a threesome with Rekha, or for you to be with Rekha alone? Some sisters like to share (same as some friends), and if that were the case, you would normally be able to tell - hints, innuendos etc that she drops. If there is and has been all along, I'd say it's safe to try and take things further with Rekha, and likely Maya would consent (even encourage!) and perhaps also join in. However, if Maya has never given any hint or inkling (in fact, even encourage, as I said earlier) that she'd be ok for you to have a go with Rekha, then I think any move you make with Rekha will ultimately end up in disaster and you will lose Maya were you to do so.
2. What's the deal with Rekha's husband? Does he live in the same house (or for example working somewhere else in another city, never around, so Rekha is left "unattended" for long stretches)? How long have they been married? Does Rekha talk about her husband? All this will give an idea as to whether Rekha's interest in you is purely lust, ie short term (in which case, again, tread with caution), or there is genuine interest ie potentially looking for love and thereby hoping to "permanently" "replace" Maya. If the latter, it comes with its own set of complications of course...
Quite the conundrum...I agree...but an "enviable" situation that many (me included!) would love to be in.
Keep us informed!