As a parent you shouldn't be telling your kids that you sacrificed your life for them, It’s hurtful and manipulative, and it’s not true. You chose to have your kids and nobody forced you to have them. Taking care of them is your responsibility.
After giving birth, a woman's internal wounds take six months to heal, 12 months for physical recovery, two years for hormonal balance, and up to five years to rediscover her identity. Relationships frequently fail during this time due to a lack of understanding. Be kind and patient with new mothers; they are facing more challenges than it appears.