Changing the Team

A few weeks ago I registered one of my sisters and I as a relay team for the Hy-Vee Tri. My other sister has decided now she wants to participate, too, and she's offered to do the bike part. When I'd mentioned it to her before, she said she had to work (she's a nurse), but she's found someone to take her shift. She has ridden a bike 24 miles before, but she's a triathlon novice (for that matter, so's my other sister, but I think it's easier to be a "newbie" on the run). I'm concerned that she doesn't really understand what she's getting into. It's not like we're intending to win any prizes, but I don't want her to be overwhelmed by the event. And, anyway, assuming she can join us now, I have mixed feelings about changing the team. On one hand, to date, I've not ridden more than 18 miles at one time, but I'd figured I'd be ready for 24 by June. Also, having only the swim to concentrate on would not be a bad thing, because I'm still getting used to the Oly distance (.9 mile). I'd wanted to use this event as a precursor to doing a complete Oly by myself in September. Will doing only the swim be enough of a test? But, then, doing the tri with both my sisters would be special. We live in three different states and don't all get together but once, maybe twice, a year. Our recent gatherings have been shadowed by parental illness, so a sister reunion held just for fun would, indeed, be fun. "The B----y Girls" on a new adventure sounds promising. Here's to Beat-Bun-Uniq!