working past baby's bed time

Kelsey
Quick question! My 6 month old goes to bed around 730. My mom watches her and my husband or I do not pick her up until after 8 due to our work schedules. Should we try to make her bed time later or just have my mom put her to bed and then when we get there try to calmly put her in her car seat. Anyone else running into this issue or have suggestions?? Thanks!!!