What to share this incident about sis across which I came recently. So am I overthinking it , after the incidents i came across ?

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It's going to be a little long read with few grammatical errors as well , cause I want to vent out and don't know whom to talk on this . I did had a Convo about this with my gf btw later on .

Some people may find it offensive as it involves my family relation . So you can avoid it if you want to .

So this happened just a few days back . My jiju and my elder sis were celebrating their wedding anniversary . They live in another town away from our families because of his job and rn I'm also doing my internship from that town only but I live in my boy's hostel provided to me for my internship .

I visit their house sometimes especially on Sundays for obviously homemade food . However this post isn't about that.

So a few days ago on their anniversary, they were giving a small treat which had a few colleagues of my BIL from his office. There were around 8 guests including me .

There was this one guy ( let's call him X ) who got introduced as a friend of my BIL and his colleagues didn't know him beforehand as well . But I knew him cause while visiting my sister's house , he used to visit sometimes as well . Also he was in the same gym which they used to go sometimes and even I went there for a month , since I'm new to the city and don't have much idea about various places , so I joined in theirs .

Now personally whatever I have witnessed , he shares a good bonding with both of my sis and jiju . Sometimes I felt something was off because of his closeness with her but I felt I'm overthinking , cause even jiju never showed any of such concern .

Now I can't go into every small detail , so I'm not going to talk about those incidents.

So during their dinner party , everything went well and he was sitting next to her on the table . And on the other side it was jiju . They were talking which I found normal cause he didn't know his other colleagues apart from them ( sis and jiju ) .

But I forgot to bring their gift , and said sorry . They said it's fine and I said I'll give it to them in the morning . But since everyone brought some form of gift or bouquet, I felt bad .

We finished the dinner at around 10:00 and everyone went towards their home .

Now while going back to my hostel , since a few of the shops were already open I thought it's better to buy the gift now rather than waiting for tomorrow as I was going to be a little occupied for next day .

So I bought the gift , made them wrap it and went to give it to them . I reached their flat and since it's on the 5th floor and around 11:00 o'clock, the guard wanted to make sure who's house I'm going to . So he made them a call and they didn't pick up , then I called and still they didn't pickup . So I thought they haven't reached home and I was about to leave as guards don't allow parking inside the building complex unless you are a guest of someone .

But at the same time a zepto guy arrived talked with the guard and went in . So as I was about to leave the guard stopped me up and said they are at home only , this delivery agent is going to their home . So if I want I can go . I made the entry and went in .

Took that zepto guy with me in the lift otherwise guards don't allow them to go inside the lift used by delivery agents and said I'm going there too .

So we got out of the lift and he rang them up to take the parcel . By that time I got some work call as well so I stopped on the corridor to talk while he moved ahead .

As I reached towards their door , I saw her receiving the parcel but to my shock she was in some form of lingerie while receiving it which wasn't very modest tbh.

Even she got shocked to see me there, I tried to act normal and said I brought you guys a gift and entered their flat .

To my surprise that 'X' guy was their with them as well and I acted like it's fine but it wasn't fine at all . They weren't properly dressed as well , clothes were thrown on sofas , some music was being played on speakers and lots of things were unusual. I put the gift on my table and excused myself as soon as I can .

I personally don't want to think anything bad about it but it didn't seem normal to me at all .

I have so many questions unanswered in my mind which I can't even ask or maybe don't even want to . I told this to my gf and even she avoided giving her blunt view on it and said to me it's their life and they are consenting adults as well so leave it .

I met my sis and jiju 2 days later and everyone behaved like nothing happened , all normal .