how to loose weight while always having to stay home???

My baby girl is 5months and I still haven't lost my after weight I haven't tryed doing nothing I guess that is the problem... Well when I had my son like a month or two latter I lost all my weight not even doing anything to loose it and I was back to my normal weight before I had my son. Well I'm getting tired of not being able to not fit into my clothes so any ideas how I can loose my weight cuz as of gyms I can't go to any cause I'm a stay a home mom and we only have one car and my husband goes to work everyday all day with it and as for walking around outside with my babies I can't ether cause I just see it to hard with my 1year in a half son and with my 5months daughter. Do yall have any clue how I can try and loose weight for me that I'm just always home and busy with my two babies???