A.,
I am not having twins, my first little girl is 2 now, and I am due in 2 months, but I am having the same dilemma, to have a 2nd shower or not. We don't yet know the gender(baby wouldn't cooperate at the 20 week Ultrasound - we are having another Ultrasound on Jan. 9); if it is a girl, they will be the same season, and we will probably not need a stitch of clothing, but if it is a boy, we have virtually nothing for clothing, and no-one with one close enough in age to do hand-me-downs.
My SIL really wants to throw me a shower - just like someone else said, every baby should be celebrated. Also, since I am having a repeat c-section, I will have a much longer recovery time, and my DH is only planning on taking one week off work. So our thought was that we would have a themed shower, "Fill the Freezer", where in lieu of baby type gifts, each guest brings a homemade pre-made (or purchased packaged/frozen) casserole or dish of some kind that can be frozen, and the instructions for reheating it, so I don't have to try to cook at first on top of taking care of the baby, the toddler and myself.
You could do something like that, from what i know about people with multiples, cooking becomes last on the list for a while. Send me a private message if you are interested in the freezer recipes I have (which I was going to send out to the guests in case they needed ideas for what to bring - then they would get a bunch of free recipes out of the deal too!) I would be happy to e-mail them to you.
There are other types of theme showers - diapers and wipes shower - you will NEED those with twins and a toddler who I assume is still in diapers!!! Or a baby feeding themed shower, with bottles and formula and baby foods???? Or a coupons shower - where everyone clips all the baby coupons from their paper and brings them to you. Or a MOM SHOWER instead of a baby shower - where they get stuff for you, since with a toddler and twins you will have precious little you time - maybe some coupons for babysitting by friends/relatives, spa/salon gift certificates, lotions and nice pjs and loungewear, etc.
http://www.pregnancy-info.net/baby_shower_themes.html
"Showers for Not So New Parents
If the expectant mom already has a child, she might not want another shower with the same baby themes. Instead, consider throwing a freezer filler shower. Instead of bringing gifts, ask your guests to bring one homemade meal that can be kept in the freezer. New parents will love not having to worry about dinner for a few weeks.
If mom already has a lot of baby essentials, you might want to throw a baby shower that is geared towards celebrating mom’s life after the pregnancy. Guests can give gift certificates for a spa treatment or video rentals; a nice bottle of wine; some coffee; homemade coupons for free baby-sitting services or anything else they think mom will appreciate.
For both of these types of showers you might not want to have a lot of traditional baby shower decorations. Instead, consider decorating the room with fresh flowers (they easily brighten a room without a lot of effort on your part) and scented candles to create a very calm and soothing setting. If you are throwing a couples shower, then both of these showers are good choices."
Here is another site with some themes:
http://www.babyshower101.com/baby_shower_themes.html
good luck - Jessie