Please stop comparing yourself to your older sister whose pre-pregnancy clothes are too big one month after birthing her children, while you are still fitting quite nicely into your maternity jeans whilst your 3 month old lay in your arms nursing. Also, stop stressing about your upcoming 30th birthday and the cruise to the Bahamas (both occurring the end of May). Instead, remind yourself on how much you love your three little ones (all of whom greatly contributed to your current "pleasantly plump" condition) and paste a picture of Marilyn Monroe to the bathroom mirror (this will especially help your post-shower ego). Keep exercising, eating tons of vegetables, and drinking silly amounts of water. Embrace your curves, dearie.
p.s. also, please can you find a bathing suit like marilyn's for the cruise? hhhhhot!