Male lead falls for widow and/or single mother female lead

Love and Secret (daily drama)
Come! Jang Bo Ri (there's a few twists on the story but for all intents and purposes Bo Ri is a single mom)
Ho Goo's Love 
Marriage Contract (melodrama, illness etc but highly recommended)

Can we love? (Divorced with a son, and there are problems with ex-husband)

Far away love (Not her own son, she takes care of her sister's son, but she is like a mother)

Autumn's concerto (Not exactly what you want, the guy fell for a single mom, but actually they are his ex-lover and son, but he can't remember them because of brain surgery and everyone hide the fact from him)

 samsoons:

Love and Secret (daily drama)
Come! Jang Bo Ri (there's a few twists on the story but for all intents and purposes Bo Ri is a single mom)
Ho Goo's Love 
Marriage Contract (melodrama, illness etc but highly recommended)

 fanitha:

Contract Marriage (widow with a daughter)

Madame Antoine (divorce with a daughter, though the duaghter barely appears)

Kazoku no katachi (divorce with no children)

Ring Ring Bell (she has a daughter)

 jinnborn:

Can we love? (Divorced with a son, and there are problems with ex-husband)

Far away love (Not her own son, she takes care of her sister's son, but she is like a mother)

Autumn's concerto (Not exactly what you want, the guy fell for a single mom, but actually they are his ex-lover and son, but he can't remember them because of brain surgery and everyone hide the fact from him)

 Ansuya:

Ms Perfect - Divorced with 2 kids - http://mydramalist.com/21736-ms.-perfect

Twenty Again - Her husband and she has an agreement to separate.  http://mydramalist.com/14827-twenty-again

Hua Jai Rua Puang - She is a divorcee with a kid .There is a twist in the story.   http://mydramalist.com/10318-hua-jai-rua-puang

These are oldies

Oh My Lady - She is divorced and has 2 kids . http://mydramalist.com/57-oh-my-lady

Last Scandal - I think she has kids and is divorced . http://mydramalist.com/423-last-scandal

Hooray for Love -  http://mydramalist.com/2698-hooray-for-love

Thanks everyone. I'll look through them and check out the ones that peak my interest. If there are anymore that you can think of, please post.

 Antonin:

Five Enough

Seen it, but thanks.

Destiny-Like Love

La Dolce Vita

Robber

Rude Women

Nemureru Mori no Jyukujyo

It's not a romance but there is someone who falls in love with her, Angry Mom. Another kind of - Loving you a thousand times.

and in Birth of a Beauty I think she was married to the guy.

Witch's Romance.