Image imported from derpibooru 
Original Description:
 
Spike is spending the day day at the beach with his two girlfriends Mesosoma and Ember. With the two being Royal and Spikes duties helping Twilight run her school the three are kept busy and days like this were all three are available are the lovely treat.
 
Ember doesn’t mind showing off her true size seducing the other two more shy members of the throuple. With all this lust and love in the air it’s causing Mesosoma to start swelling up. If this continues Ember won’t be the biggest on the beach for long.