Not Muslim myself but I like to try to respect DH in how I dress (who is), normally I wear a swimming costume which has built in short shorts which stop mid thigh (rather than showing my bottom) and frankly I don't often go swimming anyway (have not been in about 2 years) but I'm planning on going on holiday, and will be about 5 months pregnant and won't fit into my normal costume, the only maternity costumes I could find are all bog standard, so don't cover legs at all. May I ask what you wear when swimming to see if I could get something similar for myself?