Once was sending 1 of my gf back to her nus hostel during the weekend. Planning to bonk her in her hostel room but realise her roommate didn't go back home. So we decided to drive around the area and manage to find some new hdb flats. (near AYE) It was very tall maybe 30 storeys cannot remember. We went all the way up check for people. Confirm no one then started to remove her panty and bonk her doggy. Slowly unhook her bra while bonking and finally remove her spaghetti top. She was only in her denim skirt and topless.

Finally cum onto the lift doors. It was very windy and the view was ok so we didn't leave immediately. I still remember holding on to her top, bra and panty and didn't allow her to wear back immediately. We stay awhile to chat and enjoy the wind before she wear back her top (yes top only no bra, panty) and went back to my car.
Another time was at commonwealth. There was some 40 storey hdb blks. The layout was square in such a way where the corridor was very open. The blk was not occupied but a few floors up and down can see us. So we went to the rubbish chute area (it was very clean) where it was blocked by the lifts. My this gf was very scared of getting caught.

Anyway the more scared she was, the higher the excitement. She was in jeans and a blouse with tube. Manage to strip her naked except for her white tube and bonk her at the railings. (She scare other people from downstairs can see as it was an old estate but the blk is newly built.) Lastly about 15mins. Pull her into the lift with her only in her tube. Press the highest floor and let her wear back her panty and jeans in the lift and then down again to the first storey. Didn't let her wear back her blouse and we walked back to my car.