Help me with this horrible problem now!!!?

There is this guy that works at the mall , where my Mom and I always order subs. Anyway, I think he's gay and he has a VERY feminine voice. He's about 300 pounds and reminds me of a big teddy bear. So, whenever Mom and I walk up to his resturant, he looks at Mom and wails, " Heeeeeey Maaaaammmmaaa!!!" At first, Mom and I didn't care, but then at home I would start immitating, " Heeey Mama!" in his exact voice. One night, Mom and I laughed all night long saying to each other, " Heeey Mama!!". So today (after laughing all night yesterday) we go to get a sub and he says, " Hey Mama!" It was so hard to keep from laughing. I wound up coughing and looking away. I hope he didn't catch on. Anyway, I really like thoses subs and would hate to stop going there but how can I keep my laughter under control??? When I try to hold back my laughter it hurts my stomach so bad I want to die. Please help me with this horrible issue, as I do not want to embarrass myself.

bite ur tounge
say something nice
look as if u found a quarter
pretend to tie ur shoes
bite ur lips or curl them
fiddle w/ ur fingers
wear ur bangs in front of ur face
tell him u had embarassed urself and was trying to get over it
by laughing
look straigt at the menu
have ur mom order for you so u dont remember imitating him
good luck

is this really a serious problem or did you just feel like telling this story