I'm so jealous of him right now. Wonderful caption :)
This is a good caption, but has lost the meaning of FOSE... No mention of possible awkwardness since he was jerking off to his sister.. Might as well be a Great Shift caption
Jerking off to his sister...?
Oh I misinterpreted it I thought he was now his sister oops he's Emma Watson...
LOL! How about a FOSE where they pretend to beeach other?