Episode 1.2, Guts: In the beginning of the episode, a man and woman have sex in the woods. They kiss passionately, then they proceed to remove clothes. She is seen while undressing, and after, in only a bra and panties. He moves behind her and they begin to have sex. She starts to moan and the scene cuts out. No nudity is shown. Not graphic
In the beginning of a few episodes after 1.2 in re-cap of previous episodes, the scene with Shane and Lori in the woods having sex in episode 1.2 is very briefly shown. Also in 1.6 a man attempts to rape a woman.
Episode 1.3, 4 of the girls (Jackie, Andrea, Carol, and Amy) are talking about what they miss. Andrea says "I miss my vibrator." Then Carol says "So do I."
Episode 1.6: Rick and Lori are in the shower together kissing, nothing graphic is shown. Later Shane confronts Lori while drunk and against her will, kisses her and shoves his hand down her panties. Nothing graphic, just implied.
Episode 2.4, Cherokee Rose: Glenn is seen looking at condoms in a pharmacy. Maggie asks why he's looking at them and if he's trying something. He replies by saying no. She then says I'd have sex with you. She takes off her shirt and bra, the side of her breast is seen but the nipple is not exposed. They kiss and the scene cuts out.
Episode 2.6, Secrets: A man and woman are driving after an argument, she rests her hand on his groin; he turns to her, stops the car and says "Go ahead." She climbs over on his lap. They start to have sex (scene in the car cuts off when she almost kisses him in the car). It then shows an outside shot of the car in woods, with the horn honking once.
There is a scene in an early episode in season 3 where Carol is going to "practice" a c-section, on a zombie. Once she pulls the zombie's dress up, you can see the abdomen, panties and legs, however it is not sexual and not attractive.
Episode 3.3, Walk With Me: At the end of the episode, the governor walks past his bedroom door and the camera stays focused on a sleeping female, covered with a sheet.
Episode 3.4, Killer Within: Daryl yells for help from Glenn, who is in a watch tower. Glenn comes outside, shirtless. It is implied that he and Maggie were "interrupted" while having sex (completely off-screen/no audio). Nothing is shown. A few jokes are made afterward.
Also in Killer Within, Lori gives birth. See Violence and Gore category for more info.
Episode 3.6, Hounded: Andrea and the governor have sex, toward the end of the episode. Andrea's entire left leg and side of butt cheek are visible. The rest is covered by a sheet. The governor leaves the room, but when he returns he drops his robe, revealing a bare back. Andrea is wrapped in a sheet, her upper back visible. They begin kissing and the scene cuts.
Episode 3.7, When The Dead Come Knocking: While interrogating Maggie, the governor makes her take off her shirt and then her bra. Maggie is seen in pants and a bra, and afterward there are a few scenes where she keeps her arms crossed to cover herself. The governor seems like he is going to sexually abuse her, but he does not, he just slams her on a table, however it is still very disturbing.
The governor returns to his house, where Andrea is getting dressed, shown from the rear, wearing only panties (possibly a thong) and a bra while pulling her pants up. She then puts a shirt on and turns around, though the strap falls down and cleavage is visible while she talks to the governor.
Episode 3.8, Made to Suffer: Axel is talking to Beth, complementing her on being good with the baby, asking how old she is, with just a hint of attraction. Carol pulls him away and tells him to stay away from her, he says that being in a jail for so long with no women, and now suddenly there being women in his life again, he finds it hard to control himself. He also says how he thought Carol was a lesbian by her short hair, she replies that she is not.
Episode 3.11, I Ain't a Judas: Andrea sleeps with the Governor again, and in the middle of the night, gets out of bed to kill him. She is obviously naked, but the room is barely lit, and nothing can be seen besides the side of her butt when light flashes over it and then her back.
Episode 3.13, Arrow on the Doorpost: Glenn and Maggie have sex. Nothing too explicit is shown.