Not fucking but still consider outdoor.
Today GF's sis friends were in her room so me and my gf went to nearby quiet hdb void deck seats in the afternoon. Anyway cut short, gf was in a short and a white loose singlet. I can see her whole bra clearly from her top loose opening. Got turn on. Then remove her bra without removing her top because opposite blk can see us. Had to keep checking if anyone around. She gave me a HJ while I sneak my hand into her top and play with her boobs. Had to stop a few times because someone walk pass. Hide her bra between us as we didn't bring any bag. In the end cum onto her hands.
No tissue so she wipe on the table.

hide her bra inside my clothes and went back. Inside life had to faster help her wear back her bra. Not enough time but lucky no one outside waiting.