Hope you can trap her before she gives birth! She sure sounds pregnant if she's been getting consistantly wider. Pregnancy in cats knows no seasons sad to say! If the kittens are bound to go into the trap instead of the mom cat, try controlling the door with a long piece of rope. Tie it to the door (one door trap I hope ) and run the rope over the top of the trap and sit out of view if possible, or a distance at least. Put a lot of food into the trap if the kittens are getting pushy and let them gorge until they are full. Problem is if the mom cat goes in at the same time as a kitten or two...what will you do? I'd drop the door anyway on however many are in the trap, and in a closed area such as the car, use a cinch-cord laundry bag, and try to separate the mom from the kitten. I have a divider fork which is especially useful for segregating several cats in the trap. Be prepared for some bouncing off the windows if you aren't careful! Hopefully only the mom cat will go into the trap before the kittens are born. Indoors, if she's going to have them, prepare a large cage for her to use. Cover all but the front door, and put litterpan, and food near the door so she doesn't bolt out. If you have anyone handy around with some scraps of plywood a shelf can be made up quite quickly. Cut the wood so it comes out 12 or so inches from the back of the cage, and cut to the width of the cage. Drill holes around three sides (you don't need many holes) and run wire wraps (used to bundle wires together) to affix the shelf to the back& side walls mid-way up. Staple carpet remnants onto it and it will provide a spot for mom to get away from the babies as they get bigger, and it makes it a LOT easier to clean the cage as well! OK...this is getting long winded lol! If you need any more tips..holler! And keep us posted!